Hmm missed this release what with the server move and the soddin virus i picked up at a forum i visit , but heres the info from McZonk:
Just a little new Version of Commander Keen for PSP. I thought I can release a final version but there are problems with episode 2&3. So it version 0.99 instead of 1.0. I hope to fix this bug soon. Or there next version will be 0.999
Now loading and saving is supported. You can use the triangle to open save menu and you have 2 safe slots (left and right trigger). You can load via main menu (get back to main menu is also supported now).
Thanks to all old school gamers who love this game.