Find it a little too difficult. Didn't realise at the beginning that you could destroy the asteroids. I think some visual damage feedback is needed there or something like that. The extra life powerup is something I completely avoided because losing all your powerups is not worth it, atleast it seems that way. I liked the graphics and the audio I just think the difficulty needs some tweaking. I think the initial speed is too slow too. You can get really screwed if the speed powerups spawn too far away.

Game was really fun when I got the hang of it. It would be cool to flesh out that back in time mechanic when picking up a powerup in some way.

I liked the game, but there are several little flaws i would recomend you to take care on next jam or something. You got the point :)

Like @tednesday said, it's too hard to pass the wave of asteroids. I had no idea what could i do to pass it. Also wall of text at the begining is unreadable. I would recomend to divide it to several pages, or at least bold key words.

i like it, the challenge really get me, but i think some times you don`t get enough power ups to pass the asteroids.

Whoa its very fun, you have a lot of boosts there and the lazer is just AMAZING! I like the particles too. Keep it up!

Linux build does not work. Also you have a typo in the second word, should be 'is', not 'if'.