This is an improved port of a SDL game (as such, it uses nSDL) called Dodgin' Diamond 2 (which has been ported to quite a few platforms EDIT: he even mentioned this port on his page ). Improved in this case means graphics improvements, gameplay improvements and bug fixes.

It's a vertical shooter à la SNES and has single player mode, co-op mode and high scores.

The controls are as follows:
- For player 1 you can use the whole numpad to move around (7 to go up-left, 6 to go right, etc.) and 5 is for shooting
- For player 2 the keys E,F,G,L,N,S,T,U are used to move around (the same way as player 1) and M is used for shooting
Press CTRL to pause the game.
Press I to show/hide FPS.

Here are a few screenshots:



EDIT: And a new one:


Gameplay video:
The game is attached to this post. (note that it could have been at least twice as small as its current size if I had the time to rearrange the sprite sheet)

Thanks for Pomi for some CX-related testing.
Source code is here.

Click here for latest version (0.3.0)

Great!

We made a very enthusiastic news on TI-Planet:
http://tiplanet.org/forum/viewtopic.php?p=124488#p124488

Bug report:
Pushing the keys 4,2 and O at the same time returns to the menu

Thanks for the bug reports Hayleia.

Here's an updated version. What's new:
- Brighter walls
- Fixed bug when inputting high score name
- Changed controls a bit (see first post)

Previous high scores should still be there.

As for the 4,2,O-bug, it's very strange and I'll have a look at it (not going to point fingers, but might be a bug in Ndless; as far as the code goes that shouldn't happen, nor should nSDL mix keys up or something). The controls have been moved a bit however so it shouldn't be an issue at this point. Please do tell me if the keys are not good, remember however that it should be relatively easy to have two players playing at the same time.

That really looks great. Nice job porting this

For the Touch/Clickpad you should limit framerate to 15 (or allow the option to), because historically this is the framerate at which blurriness becomes acceptable, while still running decently smooth.

ALRIGHTY. I've tracked down one major bottleneck in nSDL. It was quite obvious but I never thought it would be such a slow-down. Calling any function that pumps the events (SDL_PollEvent(), SDL_GetKeyState(), whatever) seriously hurts performance in speed-critical code. Nothing can really be done about it, just don't use those functions where you need speed, instead stick to keyIsPressed() and whatnot (as most people have done so far in fact).

I changed all the in-game SDL event handling code to normal ndless-style key handling, and now the game jumped to nearly 60 FPS! It's a massive improvement. I was myself already quite impressed with what we had before, updating the whole screen and having multiple layers and everything, but I never expected that I could nearly double the framerate!

Here's a video so you can see, it's much more of a shoot em up now (you can see the framerate in the last part of the video):

DOWNLOAD ATTACHED.

Am I supposed to be getting 60 FPS on a Ti-Nspire CX? I only seem to be getting about 48. I have the latest version (0.3.0).

I would say that the 60 FPS is overclocked. I tried playing this game when my calculator was overclocked to 252 MHz for the CPU and 65 MHz for the AHB and I got around 57-59. When I opened the FPS meter at the start of the game ,it briefly spiked all the way up to 89 FPS.

Also, is it just me or does one of those screenshots show an FPS of 206? 0.0