Those shock waves are really neat. I love how they look in this. Great job!

good additions to the shmup tutorial, would be nice if the pickup items were tracked/did something in gameplay- additional score, weapon upgrade, restore health, etc. Also, maybe making them drops from enemies you destroy rather than randomly generated? Fun game, though.

The shockwave effects were really what sold the experience for me, I wonder if those could be more integral to the gameplay? Otherwise you've got a pretty solid shmup with some flashy visuals. Also couldn't tell what the colorful floating ball was?

SUPER great visual effects, I love the explosions and the background and everything else on screen!

A cat SHMUP? genius.  I feel like you have a welcoming market for this type of thing. 

nice smooth schmup!