idk if you still take suggestions but
Switch the places for Arcade and Streak building

If arcade is literally at start
people could hang out inside of it and have fun
also revamp the look of arcade, make it look more attractive.

Streak building, doesn't look good anyways and barely have a visitor.

Maybe this isn't about Levels anymore -v

Add arcade achievements like Score 100/250/500 in Flappy Snk 1 & 2 and other arcade games
and achievements for 500/1000 Arcade games played
Example: Will only count if the player scored 50+

Add more Arcade items, or rework the stats of some weapons.