Thanks very much for the demo. It works perfectly on the BackBit cartridge on a 1-slot MVS. It’s already very smooth to play and reminds me of Ruffn Tumble on the Amiga. It would be nice if you add possibility to shoot upwards whilst moving left/right, just like in the Metal Slug series. The sound effects sound very crisp. The music still sounds a bit low-resolution and little bit muffled. I’m keen to see how it develops in future.