I've played that version as well, but you can still play the original via XMAME - you just have to copy your ROMs to the internal SD card in this directory:
/media/data/local/share/xmame/xmame**/roms (where "**" is 52, 69, or 84 depending on the version you have). MAME .37b15 is MAME 52, btw.
Then you use the shoulder buttons in Xmame to select the version of MAME ROMs you have installed, press Start to force a refresh, and presto! All the twin-stick MAME goodness you could ask for.