I’ve enjoyed playing this game so far, but it does feel a little bit redundant after about 10-15 minutes. I have a few suggestions that could improve the overall flow of the game:
1. Instead of the power up every 50 hits, I would randomly add power ups throughout that the player can collect by slapping them (ex. Invincibility, 2x multiplier, speed boost, etc.)
2. Upon initial install, I would have a simple tutorial that shows the basics of the game (tap and hold to slap, watch out for objects and cops, slap people for 1 point, etc.)
3. Use an XP style of leveling up so you can unlock boosts at the start of the round, earn coins to purchase new things (skins, abilities, different train styles, different level themes).
4. Add an option to continue upon death at the expense of some coins.
Hope some of these things get implemented!