Great game. I love tower defense genre and bullethell games, so I enjoyed this combination.
Art was great and music was good too, but it was a little repetitive.
What the game lacks is a way to slow down the player movement to avoid tighter patterns and it definitely doesn't have enough lives. With movement speed this high it's easy to accidentally run into a bullet and patterns get hard even before wave 5. Because of that I could never test the most expansive tower. And it looked so cool...

really interesting little concept, bullet hell + tower defense is something that could be a great little mobile game! 

I also really liked the implementation of the theme. Definitely one of the best I've seen there.

The art is clear - no issues with visibility at all. 

There's a menu!! And a tutorial! And an exit button! You're already above about 50% of steam games ;) 

I actually don't think I can really complain about anything. This is rare for me, I've usually got some constructive criticism... An incredibly minor gripe, but I don't think the isometric angle works too well for this sort of thing, top down would be better - but that's a VERY minor thing. It works well enough, I just got a little confused by depth and position xD

Wow, that game is really good, the idea that you kinda force the player to be at the center for gain more points and this great art style, good job on making this game!