Use "W,A,D," to move and "P" to shoot bombs that go straight up. "O" to dash. Avoid everything. Keep all 5 health to get "S" rank at the end. (This is a Demo of the full game called "The blue man" which you probably guessed, this is just one of the bosses, of course without music Rn, might add music later... Full game maybe, enjoy)
Thanks to Cuphead, (Btw, this is a complete rip-off of Cuphead, ik) for the "inspiration" and enjoy "Painful Purple" (P.S. his name is "The blue man" the "T" is capitalized and nothing else, not a grammar mistake I promise"