I was thinking about the most simple games who would be cool to have as template in Gdevelop so there is the list in case someone wants to contribute to it:
Snake;
Tetris;
Chess/checkers;
Board games (Like monopoly, goose game);
Pac man (I am making it right now);
Connect dots (Maybe i figured out how to do it);
Plumber;
Space invaders;
Doom;
Bubble bobble;
Rampart;
8 pool;
Pinball;
Cut the rope;
Poker;
Zuma;
Timberman;
Worms/Shellshock;
Frog;
2048;
Bricks breaker;
If you have more suggestions feel free to add them