It's ugh...... normal I guess......
I have some notes:
1. Just 4 levels? Maybe too short. 15 to 20 is fine to me or you can add more.
2. Coins are just to help you get more coins, extra stuff, maybe you could make it skip a level or button will disappear 2 times faster.
3. You should warn that clicking the help button restarts.
4. Adding medals will be more fun.
5. If you win and play again (without refreshing the page), the 'Auto Money' will still continue (if you upgrade to Level 1 at the first time you have play)
Others are fine to me.