Thanks!
I changed 4 line clears to quads out of necessity, I hope you understand...
About saving on OpenFPGA, I had a look around but the GBA core is closed source and has no documentation so I don't know how to help you. You should probably ask around is some community that focuses on the Analogue Pocket... The game supports both SRAM and Flash saving, but I've seen some emulators that detect the save type using an official game database and otherwise disable saving. I would try copying a savefile from another game and renaming it to apotris.srm or whatever you named the rom, just in case this helps it detect the save type (don't worry about the save being different, if is read it should be hopefully detected and reformatted by my code).