After a month of hard work ! 
I present to you…
Tomb of the Mouse Template !
- Auto-fit any screen size !
- Supports PC & Mobile !
- Firebase leaderboard.
And much more !
Get it → Modify it → Sell it 
or Learn from it 
Available on my itch page: 
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My other templates:
Beat 'Em Up Template
Among Us Template
Online Multiplayer Template
Terraria Template
Fighting Template
Candy Crush Template
Roguelite Template
RTS Template [Strategy]
Multiplayer Ghosts Template
Cards Ranks Template
Land Maker Template
Pico Park Template
Idle Clicker Template
Super Smash Bros Template
AutoTile Extension (+Example)