Nicely rounded for a shoot-em-up and the game's superhero concept fits into the theme. Having mutliple heroes and different models helps replayability a bit, and I really liked quickly discovering that the power-up abilities were insanely more useful than the laser. The flavour text on the power levels was a nice little comic touch. For balancing, I wonder how you could gate the use of the power-ups progressively to make the player slowly ease into the sense they're becoming insanely powerful? I felt invincible pretty quickly, but I gotta say, it was a good feeling! Nice work!