It's just a a simple mini game (with buggy physics) that was inspired by Dimension Shift and Darl's other minigames.
I haven't sat down and actually used C for years so it's pretty poorly written and unoptimized. I ended up brute-forcing a lot of things just to make it work. Just put in a couple hours of relearning C and figuring out the Ndless SDK to write a first (and probably last) contribution to the community. It would have been faster if I knew Lua and just used Lua, but I've never used a scripting language before.
So no, it is not an uber awesome grayscale raycaster with variable height walls and the ability to look up and down. And it's not SirCmpwn's "Easy Game." It's closer to Levak's and ephan's entry, but no sound.
Lol, I actualy don't even own a calculator so I don't know if it actually works outside of emulating it on a nspire_emu with OS 2.01 and clickpad.
No need for a CX; any Nspire with an OS greater than 3.0 will do. Or you could even try them online on TI's Document Player.
Does it emulate the sound? That's what will really sway my vote.