Have you not played Kero Blaster yet?
Go and buy Kero Blaster, it's in the same vein and made by the same person.
Steam: http://store.steampowered.com/app/292500/
Playism: http://playism-games.com/game/141/kero-blaster
For some time, I wonder if the creator of Cave Story is still alive
He won't understand that you're joking.