Kaitaiman (Ikiki)

"たてもん解体" - Author's description

Notes: "Rename the file to "kaitaiman.exe" (or something similar) for it to work. Controls: Ctrl - smash, shift - jump. Hold Z to activate special powers (collect canisters to upgrade hammer). Press the J key to suicide. Smash and destroy everything to win."

Download here (Windows)