Click green flag twice. Arrow keys. Z to select. Pro tip: after gaster blaster circle, don't use item.
For now, it is incomplete, but I hope to finish it because it is my greatest work (FOR REAL THIS TIME) Aug 24: Bug fixes. Aug 25: More Bug fixes, added attacks. Sep 3: Additional attacks added. Sep 5: Blue soul now KIND-OF goes left and right on jumps. Oct 9: Made attack 5 harder, plans to continue... still only one view... Oct 10: Tries to continue the game... basically failed.