When the game is finished for ARM, we will build MIPS and SH3 versions maybe, and if the speed is good (SH3 is the slowest PPC CPU as i know), we will release them too.
Gangsta Race is not a remake of Micro Machines - this is original game, but the fans of MM will like it sure
The levels are stored in compressed files, and the required free ram to run the game is 6.0 - 7.5 MB.