I wonder why didn't I see these posts earlier...
Thanks. I knew about that stage bug, but I was unsure how to fix it, so I left it as it is :P
And about Beta's feedback, I only work with small sprites because there're no normal-sized spritesheets available for the characters I want to make, also I can easily get addons made by friends in this style; also the full game where Beta is featured has similar sprites. The unblockable thing wasn't intentional for the Power Laser (I kinda forgot it was), but the other beams are really easy to dodge, they're unblockable for balance