The powerups were satisfying, the visuals are great, and the music/sound choices are good. I found it difficult to reliably protect the protagonist as the enemy numbers increased, and sometimes he would get killed as I quickly move to click a powerup and get out of position to deflect him. This would have been okay if the game did not reset to wave 1 of 10 on every death, but I wish I could have used number keys to activate abilities. Despite this, I enjoyed trying different abilities and thought they were all cool. The last minor thing is that the initial "click here" prompt was confusing: I tried to click the arrow itself at first.