Really liked the game, tho very hard, only got to the first 60 seconds. :)

Surprisingly deep game!  I like the enemy variety and the "help" (Gradius-like Option).  Really adds an interesting layer to an otherwise simple concept.

I appreciate the way the rotation works.  It took a few moments to get used to but I like it a lot more than something like Asteroids - no inertia lets you be a lot more intentional with how you're navigating all the bullets/enemies.  Also, the persistence of upgrades between playthroughs/game launches is really nice.

The button map is a little bit awkward and I found myself pretty unsure of what button was what in the menu. E.g. the rotation button, which I'm holding for a decent amount of the game, suddenly sets me to the exit/negative menu option.

Otherwise, really neat game!

Congrats on your submission!  I couldn't get used to the controls and it seems to be really hectic after a while.  It reminded me a bit of asteroids with the controls, that was always a difficult one too.  One issue I had with the game is that when I would die, the upgrade screen would come up and disappear so fast because I was shooting at the time.  I think having a timer on death to give the users a moment to react to being hit would be a good addition to make the gameplay feel more solid.  Not game related, but submission related, you might want to add a few screenshots to your game page.