Interesting concept. I like it. The art was lacking, and sound would have made it better. You didn't get your first upgrade until wave 11, but then, at wave 20ish, you got 2 new upgrades... it felt like too little, then too much. I think spacing them out would be better.

Also, the bugs were very annoying. I think that's the biggest issue. Waves not going out when you clearly have none on screen, enemy bullets going through your waves, just to name the biggest two. Also, the fact that your bullets also hit your own waves was more annoying than a bug... but maybe it was a bug.

Very nice looking game! I like the overall visual design and different abilities the player can use. 

I don't understand, however, how exactly it is connected with the jam's theme. 

this game is really good ! although it was a bit repetitive  near the start  it got way more fun  once I got the third ability. it would have been even better with sound though.

Good game! But a little bit of sound could have improved it a lot!

Awesome little game, I loved the levels of gameplay, super fun!. Well done!