Here's a Doom WAD I made one day in 2013 and then abandoned for almost exactly 6 years. The other day I remembered it existed, dug it out of a dusty old backup of a long-dead laptop, and cleaned it up a bit.

LUMBERJACK.WAD: You are in an open space filled with trees. Somewhere there is a chainsaw. You can use it to cut the trees down.
TREEPUNCHER.WAD: Inspired by an earlier, buggy version of the same level, it's basically the same except you can also destroy trees by punching them.

Requires a ZDoom-compatible source port (such as gzdoom) and DOOM2.WAD as a base. (I used zdoom to develop it originally, because it was 2013.) It'll also work with Freedoom Phase 2 but it just doesn't feel the same.

I feel like it's appropriate to submit to The Great Resurrection Game Jam more than a year late?