Before I get too far, I just wanna say that this game is NOT that bad. I’m just saying these as suggestions.
Now that that’s out of the way, on to the ideas.
1. Coins and a shop. Maybe you can make temporary or permanent upgrades.
2. Drop the timer. Without a timer, you can make it an infinite runner with randomly spawning sections that link together.
3. Power-ups. Just adding an invincibility item like the super star can improve the game by a lot.
Remember that these are just suggestions. You can change it, or just not add them.
Thanks either way!