Going for the 'PEACE KEEPER' medal.
Fuuuuuuuuuuuuuuuuuuuuu- the invincible medal would be easier.
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Anyway.
Obviously Star Guard. Should of had a shout out to that guy in the Authors comments at least. Would of been could to have a little story to go with this tribute as well. Let me pitch you a story real quick:
Could of been like, a pre, and your a dude who's sick of being a dude for the bad dudes. Eh? Ehhh?
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As for gameplay, killing stuff feels AWESOME. The way the particals fly off of enemys and disapear is one of the main causes for this AWESOME.
Jumping is good, but theres hardly any room to jump around.
Wall jumping felt a tid bit off. Like, it was good just with holding in the jump button and letting it do it itself, but trying to speed up the climbing process by moving with the left and right arrow key was a bit sluggish.
Maybe have some beta testers, or keep a dev blog. I'v got a friend who's messing with C++, and made a hour long Cavestory demo, and he had no problem getting tons of feedback.
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All in all: You could of done better, but this is nothing to sneeze at.