for my games i like to use a small screen resolution size of 160x144 (gameboy resolution) this ensures i have crispy looking pixel art.
Only using a limited color palette keeps your game looking uniform, and helps add vibes to ur game.
GAME JUICE is so important, the way ur camera moves, particle effects, shaders, tweening and animations... basically everything that has to do with game feel and visuals... getting this right is what makes or breakes ur game.
For my itch pages... i use CSS to decorate my pages, u can request access through Itch support
Just to summarize:
- Small resolution
- Limited color palette
- Game juice
If u can get those 3 right, u shud start seeing some improvements to ur games