Interesting, although i wonder if one where you don't have to enter angles and instead move around some sliders would be better, like Obliterate on the PRIZM...

Also it would need to fix velocity so we can't enter crazy numbers like 1500 and shoot through buildings

This was originally written in QBASIC, and i believe actually came with it. The original source is probably available somewhere online. This would be a great Lua project for someone, and it really shouldn't be a hard port at all. Especially if you can find the original source. You should give it a try Augs, it'll be a good learning experience.

I've started some game like that some time ago, with physics done manually (no need of 3.2)
Jim and I were thinking about redoing it from scratch with proper physics handling (3.2's physics engine)

https://github.com/adriweb/Obliterate-Nspire


The physics engine makes us do things like that easily :


Even though I'm not sure such detail would be necessary, it can be an idea.