Wow! lol Well since people were complaining that I released a game with too many bugs, I've been self testing which is taking forever to fix all the issues. I may end up just updating here and getting bug reports, because honestly doing it on my own is taking forever.
Yes, we'll probably add xp gain to bosses in a future update. Every 3rd boss unlocks a new weapon or shield. Energy, is your ship's shield before hp is subtracted from bullet damage. It is also used for weapons you unlock. So after the 3rd boss, you unlock the plasma blast. It cost 3 energy to use (press 's' to fire). There's no rate of fire on it, but it does consume energy.
yesterday, I defeat 2nd Boss, but I can't dodge 3rd Boss skill, big fireball * N. today, game don't load, restart. and now, I defeat 2nd Boss again, but I can't damage 3rd Boss, 90 seconds!
 "Stickmen Castle Defense")
 "World Ender")
 "Idle Awards 2")
Hm, seems like it somehow have the same stats of the regular crossbox, i will fix that : )