I'm digging this game, it has beautiful graphics, cool effects and fun gameplay. However, there were two things which I'm not too sure if they're actually just me doing something wrong, but I think you could take a look at:
-The enemies' hitbox. It seems a bit bigger than the enemies themselves and thus I sometimes lose a life without really touching them, just being really close.
-I don't have any money in the shop after a few runs. Are you supposed to collect many yellow orbs / have a high score to get money, or is there some other error?
Nevertheless, I enjoyed the game and really like the game's direction, I'd just suggest to see if you can fix some small errors in it to make it more appealing to people playing it for the first time. Either way, good work! ;)