It's very strange that you can't exit a level without going back to the main menu. You should be able to restart a level or at least exit to the level selection area. Just a weird UI choice.
Also it's incredibly annoying that you can't have any control over what weapon you start a level holding. I frequently forgot that I had to switch to my laser at the start and then I'd take damage and then it was a choice between letting my guy die (slowly because of invincibility timer) or exiting, going to play level, and scrolling over to my level.
Also upgrading the laser has no effect on its damage. No noticeable effect anyway.
I hate the unavoidable damage. Like on boss: wr. He fires tons of unavoidable shots. If you're going to let him fire arbitrarily across all three tracks, then let us move arbitrarily across them. Don't have gaps.
Also on that boss, the explosions from my shit hitting him cover up so much horizontal that I can't see his shots until it's too late. Stupid oversight on your part.
On my tenth try on him because of unavoidable damage. I thought game developers had learned from that design mistake. I guess there are some that haven't learned that yet. Well here is ME teaching you right now. Learn it.
I see now that upgrading weapons gives them an ultimate shot. The game didn't tell me that. The Author comments did.
Heard of player training? It's a thing. It happens in the game.
Well I beat it and got all the achievements and it was definitely a good game and I'm looking forward to more.
I'm glad we had this talk and I was able to teach you the things that I understand that you don't.