I've made an engine which can create lines in 3D space. You can create objects from these lines (e.g. a cube), move the objects around and turn the objects (I would like to include camera rotation as well). This is done, but now I have no idea what to do with it. The problem is that I feel like I only have one shot with this (more projects about the same thing usually end up with the first one being the only popular one). I've had several ideas, but most of them are pretty bad, so I'd be happy for suggestions.

My ideas:

1) Some 3D game, like a platformer or something like primitive Minecraft.

2) Some educative project, like some explanation of geometry.

3) A 3D rotatable Rubik's cube (the problem is that the controls would be confusing and that filling the stickers would be hard since the engine can only draw lines)

4) A designer where you could make objects like for example a house and explore them.

Well, that's about it. I'll be glad if you give me some ideas or if you comment on the existing ones.

Thanks in advance.

Why don't you try to create a puzzle platforming game that requires you to move some of the blocks around to complete the levels. For example one level could have you find 3 blocks and place them in one area to open a door to the next level or you have to build stairs out of blocks laying around to build stairs to advance.

3d art
scroling game
RPG
mario platfoormer
pen scrolling animation collab

Interesting ideas, thanks! The blocks idea is neat if a little hard to program, I'm unfortunately a bad artist so the 3D art is not possible, and mario would be too hard to animate. The rest are general (and not that relevant to 3D), but I really like the blocks idea. Thanks.

P.S. I'm still open to any suggestions.

I've always been interested in primitive 3D-type stuff with Scratch, and as such I've looked back to the early years of 3D gaming. As such I would recommend looking into making a game based around a First Person Shooter, since games like Wolfenstien 3D and Doom were able to use primitive 3D to their advantage. You can make mazes in this supposed FPS and not have to worry about crazy shapes since you can just be going down corridors or through a castle or something. I can't tell you what kind of FPS to make, but if I had the tools I would make a tech demo based on Wolf 3D, figuring out what makes that kind of game fun and than adjusting it to whatever your mind comes up with.

If you read this, thanks!
-Donutbros