The gameplay is pretty fun, and I dig the visuals. The UI was a bit confusing at first, and also the controls: I didn't know if I had to drag the mouse, but I eventually figured it out.
The shop is a nice addition (but as other have said, it's very op) . The music was a good choice, but the SFX could get a little repetitive after some time.
It's a fun game to play, figuring out the best path to recover your attacks and collect the most coins was an interesting loop. Good job with this one!