From the author:

I've spent a bit of time porting XRick over to the TI.

Features 15 color F18A backgrounds with 8 color sprites (and 4 sprite palettes), so it's pretty colorful. Based mostly on the Atari ST version in the code.

The ROM is a 256k combined ROM - this was a tight fit! It will autodetect F18A at startup, and if not present will fall back to standard graphics (though sprites are all white in this mode). It also requires 32k and REQUIRES a joystick.

In game, '4' toggles audio, and 'P' toggles pause. Otherwise, use joystick 1 to move, up to jump, down to crawl. Rick has three tools used by holding fire then pressing a direction:

Fire+Up - fire gun (bullets are limited and refreshed by crates)

Fire+Down - lay dynamite (also limited, and back off before it explodes)

Fire+Left/Right - poke with stick - good for some traps and waking some enemies. Briefly stuns other enemies, but this is not very useful.

In case you are not familiar with Rick Dangerous - expect to die A LOT. This is a memorization game for the most part, and a lot of traps give little to no warning.