Cave Story creator Daisuke Amaya has announced his next game, a Contra-styled 2D action title called Gero Blaster. But unlike Cave Story, which started its life on PC and branched out to other platforms, this one is releasing first on iPhone.

Polygon reports that the game was announced at the BitSummit indie conference in Japan. According to a product page at the event, the game is aiming for a release in May 2013, though that could only be referring to the Japanese date.

Amaya is currently looking into other platforms, and Cave Story+ publisher Nicalis has taken to Twitter to gauge interest in 3DS and Vita versions. Nicalis' Tyrone Rodriguez has even tweeted a picture of it running on a 3DS XL.