Check out http://splatood.github.io/
D-pad to move, A to flick roller or fire charger, START to pause. Menus accept D-pad to move cursor and START to select an item.
Install cc65 v2.13.3 or thereabouts and then run make
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Assets were created in NESST and Famitracker.
There is a tool to convert binary nametables into C headers in util/bin-to-h.py
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We target an NROM256 cartridge with two 16kB PRG ROMs and one 8kB CHR ROM.