Played the game again after the update ^_^ . Reached level 51 (score 8100) but then I felt bored XD so I killed myself [hopefully I didn't miss anything in the game]. Managed to reach max speed and max dash (but didn't max the other things).
side note: Since the levels are too repetitive, I think that waiting 10 levels to see the 2nd type of enemies is too much wait. Honestly, I would make it appear as soon as level 3 or 5. and maybe by level 15 or 20 already show the purple enemies.
Side note 2: For me, the fun levels were the ones were the gold ones and the orange ones were introduced, because they gave some challenge, but it wasn't hard enough (but maybe make their hit stronger than -5)