Good concept, I think having the moon collision shrink the sun rather than instant-kill it would make the game more approachable. Well executed and fun mechanic as-is, however. It would be nice to have a high-score mechanic so that I can compete with my previous runs.

I liked the "you get bigger/smaller" aspect, but needed breaks in the waves.  It wasn't really possible to collect the powerups because the enemies just spawn too quickly.  :(  There was an exploit though where if you fly off-screen they'll pile up in one place and then you can take out like 50 with one shot.  For some reason the controls confused me--maybe I was expecting inverted because it was a flight-type game, not sure.  But I did like the whole thing about getting bigger/smaller.

I really like the size mechanic, would have liked more if enemy hits weren't instadeath. Maybe enemy hits also decrease your temperature? Very hard but in an entertaining way, good job!

Music is great and the game is fun. Very good use of making shooting decrease your size so you can't spam shoot. It is a little hard on laptop though just be warned. Maybe decreasing enemy speed a small bit would help