You can walk around a procedural generated maze smashing barrels, MAN!

Each refresh the maze will be different.

https://raycast.goeshard.org/

Not much going on other than that but it's pretty cool I guess if you're interested in raycasting algorithms.

https://github.com/divSelector/raycast/

I learned to do it from this https://lodev.org/cgtutor/raycasting.html