From OHRRPGCE-Wiki

[edit] Cheat

It is on the main page of this game, but having a specific item will avoid one boss in the game. There are no other cheats in this game that I know of.

[edit] Bugs

There is one bug in this game, so please be sure about it. Never ride your vehicle from the side, as that will seriously screw things up. I am telling you this because I don't want anybody writing on Dorumagesu's talk page writing that the game went crazy and you lost all of your progress.