You could try using RPG Maker to create it. A lot of people made stuff for PSX back in the day like that. Not as cool/hard as making an entire game on your own but still something.
http://www.emuparadise.me/Sony_Playstation_ISOs/RPG_Maker_%5...
http://www.emuparadise.me/Sony_Playstation_ISOs/RPG_Maker_%5...
I tried to use Chipmunk Basic (http://sourceforge.net/projects/psxbasic/) with the Game Enhancer hooked up to a serial port on my computer...no dice
I wonder what would've happened to my career had that worked when I was 12.