diff --git a/README.md b/README.md
index 73bd9cf..8915e9e 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,12 @@ The [rules](./rules/Deep_Future_Rules_1_6.pdf) include tables and guidelines for
 
 ## How to Play
 
+### Play Online
+
+Click the "Play Online" button above to play the game in your browser.
+
+### Play Locally
+
 - Download [soluna](https://github.com/cloudwu/soluna/releases/tag/nightly) (the game engine runtime).
 - Clone the game repository.
 - (Optional) For Linux users with Simplified Chinese, install the font `WenQuanYi Micro Hei`.
@@ -40,6 +46,7 @@ soluna.exe main.game
 Feedback is welcome. Please include your save file when reporting issues. The save file can be found at:
 
 - Windows: `%USERPROFILE%\Documents\My Games\deepfuture\save.txt`
-- macOS | Linux: `~/.local/share/deepfuture/save.txt`
+- macOS & Linux: `~/.local/share/deepfuture/save.txt`
+- Web: Browser Local Storage
 
 To share your thoughts about the game, please use Discussions.
diff --git a/README.zh-CN.md b/README.zh-CN.md
index b2f0fd7..f9c155b 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -22,6 +22,12 @@
 
 ## 如何游玩
 
+### 在线体验
+
+点击上方“在线体验”按钮，即可在浏览器中游玩游戏。
+
+### 本地体验
+
 - 下载 [soluna](https://github.com/cloudwu/soluna/releases/tag/nightly)（游戏引擎运行时框架）。
 - 克隆本游戏仓库。
 - （可选）Linux 用户如需简体中文，请安装字体 `WenQuanYi Micro Hei`。
@@ -40,6 +46,7 @@ soluna.exe main.game
 游戏正在持续开发与改进中，欢迎参与测试并提供反馈。遇到问题请带上存档文件提交 issue，存档文件可在以下位置找到:
 
 - Windows: `%USERPROFILE%\Documents\My Games\deepfuture\save.txt`
-- macOS | Linux: `~/.local/share/deepfuture/save.txt`
+- macOS & Linux: `~/.local/share/deepfuture/save.txt`
+- Web: 浏览器 Local Storage
 
 关于游戏内容的交流，请在 Discussions 中发帖。
diff --git a/core/mouse.lua b/core/mouse.lua
index 007786d..65b34d4 100644
--- a/core/mouse.lua
+++ b/core/mouse.lua
@@ -143,6 +143,10 @@ function mouse.focus_region()
 	return focus.region
 end
 
+function mouse.focus_object()
+	return focus.object
+end
+
 function mouse.scroll(delta)
 	mouse.z = mouse.z + delta
 end
diff --git a/core/touch.lua b/core/touch.lua
new file mode 100644
index 0000000..88ceb05
--- /dev/null
+++ b/core/touch.lua
@@ -0,0 +1,216 @@
+local mouse = require "core.mouse"
+
+local TOUCH_LONG_PRESS_FRAMES <const> = 18
+local TOUCH_MOVE_THRESHOLD2 <const> = 12 * 12
+-- Regions that require a confirmation tap.
+local DOUBLE_TAP_REGIONS <const> = {
+	hand = true,
+	neutral = true,
+	homeworld = true,
+	colony = true,
+	discard = true,
+	deck = true,
+	card = true,
+}
+
+local REGION_CONFIRM_DOUBLE <const> = {
+	deck = true,
+}
+
+local touch = {}
+
+local current_frame = 0
+local pending_clear_focus
+
+local function dist2(x1, y1, x2, y2)
+	local dx = x1 - x2
+	local dy = y1 - y2
+	return dx * dx + dy * dy
+end
+
+local state = {
+	active = false,
+	pressing = false,
+	double_candidate = false,
+	require_double = false,
+	moved = false,
+	start_frame = 0,
+	start_x = 0,
+	start_y = 0,
+	x = 0,
+	y = 0,
+}
+
+local last_tap = {
+	require_double = false,
+	object = nil,
+	region = nil,
+	x = 0,
+	y = 0,
+}
+
+local function clear_last_tap()
+	last_tap.require_double = false
+	last_tap.object = nil
+	last_tap.region = nil
+	last_tap.x = 0
+	last_tap.y = 0
+end
+
+local function store_last_tap(focus_object, region, x, y)
+	if focus_object then
+		last_tap.require_double = true
+		last_tap.object = focus_object
+		last_tap.region = region
+		last_tap.x = x
+		last_tap.y = y
+		return true
+	end
+	if region and REGION_CONFIRM_DOUBLE[region] then
+		last_tap.require_double = true
+		last_tap.object = nil
+		last_tap.region = region
+		last_tap.x = x
+		last_tap.y = y
+		return true
+	end
+	clear_last_tap()
+end
+
+local function reset_state()
+	state.active = false
+	state.pressing = false
+	state.double_candidate = false
+	state.require_double = false
+	state.moved = false
+	state.start_frame = 0
+	state.start_x = 0
+	state.start_y = 0
+	state.x = 0
+	state.y = 0
+end
+
+local function apply_press()
+	if state.pressing then
+		return
+	end
+	mouse.mouse_button("left", true)
+	state.pressing = true
+	state.double_candidate = false
+	clear_last_tap()
+end
+
+function touch.begin(x, y)
+	mouse.mouse_move(x, y)
+	state.active = true
+	state.pressing = false
+	state.moved = false
+	state.start_frame = current_frame
+	state.start_x = x
+	state.start_y = y
+	state.x = x
+	state.y = y
+	state.double_candidate = false
+	state.require_double = false
+	local region = mouse.focus_region()
+	if region and DOUBLE_TAP_REGIONS[region] then
+		state.require_double = true
+	end
+	if last_tap.require_double then
+		local focus_object = mouse.focus_object()
+		local same_object = focus_object and focus_object == last_tap.object
+		local same_region = (focus_object == nil and last_tap.object == nil and region ~= nil and REGION_CONFIRM_DOUBLE[region] and region == last_tap.region)
+		if same_object or same_region then
+			state.double_candidate = true
+		else
+			clear_last_tap()
+		end
+	end
+end
+
+function touch.moved(x, y)
+	mouse.mouse_move(x, y)
+	state.x = x
+	state.y = y
+	if not state.active then
+		return
+	end
+	if not state.moved and dist2(x, y, state.start_x, state.start_y) > TOUCH_MOVE_THRESHOLD2 then
+		state.moved = true
+		state.double_candidate = false
+	end
+end
+
+function touch.ended(x, y)
+	mouse.mouse_move(x, y)
+	state.x = x
+	state.y = y
+	local region = mouse.focus_region()
+	if state.pressing then
+		mouse.mouse_button("left", false)
+		clear_last_tap()
+		reset_state()
+		return
+	end
+	if state.active then
+		if not state.moved then
+			if state.require_double then
+				if state.double_candidate then
+					mouse.mouse_button("left", true)
+					mouse.mouse_button("left", false)
+					clear_last_tap()
+					pending_clear_focus = true
+				else
+					local focus_object = mouse.focus_object()
+					if not store_last_tap(focus_object, region, state.x, state.y) then
+						reset_state()
+						return
+					end
+				end
+			else
+				mouse.mouse_button("left", true)
+				mouse.mouse_button("left", false)
+				clear_last_tap()
+			end
+		else
+			clear_last_tap()
+		end
+	end
+	reset_state()
+end
+
+function touch.update(frame)
+	current_frame = frame
+	if pending_clear_focus then
+		mouse.set_focus(nil, nil)
+		pending_clear_focus = nil
+	end
+	if not state.active then
+		return
+	end
+	local region = mouse.focus_region()
+	local need_double = region and DOUBLE_TAP_REGIONS[region] or false
+	state.require_double = need_double
+	if need_double then
+		local candidate = false
+		if last_tap.require_double then
+			local focus_object = mouse.focus_object()
+			if focus_object and focus_object == last_tap.object then
+				candidate = true
+			elseif focus_object == nil and last_tap.object == nil and REGION_CONFIRM_DOUBLE[region] and region == last_tap.region then
+				candidate = true
+			end
+		end
+		state.double_candidate = candidate
+	else
+		state.double_candidate = false
+	end
+	if state.pressing or state.moved then
+		return
+	end
+	if frame - state.start_frame >= TOUCH_LONG_PRESS_FRAMES then
+		apply_press()
+	end
+end
+
+return touch
diff --git a/main.lua b/main.lua
index 5d4dcd1..4f56cf1 100644
--- a/main.lua
+++ b/main.lua
@@ -15,6 +15,7 @@ local loadsave = require "core.loadsave"
 local track = require "gameplay.track"
 local vbutton = require "visual.button"
 local mouse = require "core.mouse"
+local touch = require "core.touch"
 local keyboard = require "core.keyboard"
 local text = require "soluna.text"
 local setting =require "core.setting"
@@ -155,10 +156,23 @@ function callback.mouse_scroll(x, y)
 	mouse.scroll(x)
 end
 
+function callback.touch_begin(x, y)
+	touch.begin(x, y)
+end
+
+function callback.touch_end(x, y)
+	touch.ended(x, y)
+end
+
+function callback.touch_moved(x, y)
+	touch.moved(x, y)
+end
+
 function callback.frame(count)
 	local x, y = mouse.sync(count)
 	vdesktop.set_mouse(x, y)
 	flow.update()
+	touch.update(count)
 	-- todo :  don't flush card here
 	vdesktop.card_count(card.count "draw", card.count "discard", card.seen())
 	map.update()
diff --git a/visual/region.lua b/visual/region.lua
index 3cf2dd2..a709f4b 100644
--- a/visual/region.lua
+++ b/visual/region.lua
@@ -190,7 +190,14 @@ local function draw_card(obj)
 end
 
 local function test_card(obj, mx, my)
-	return obj._move == nil and vcard.test(mx, my, obj.x, obj.y, obj.scale)
+	if obj._move then
+		return
+	end
+	local x, y, scale = obj.x, obj.y, obj.scale
+	if obj._focus_time then
+		x, y, scale = focus_args(obj)
+	end
+	return vcard.test(mx, my, x, y, scale)
 end
 
 function region:transfer(card, new_region)