I get the idea behind this game, you create lines of code while jumping as a C# script, cool. But the implementation is really poor in this one. It feels like you made this game in 1-2 days to be honest, probably because of lack of time or skill. It's just not polished to the state where it can actually be fun to play. Also, a lot of bugs.
If that's your frist game jam - it's fine, you'll get better eventually. But next time try to plan what your finished game will be like, before even prototyping it.

You can watch my playthrough at https://www.twitch.tv/videos/328062113?t=03h12m52s

Also be sure to rate my game too https://itch.io/jam/blackthornprod-game-jam-1/rate/319192

The visuals look nice, especially the background. The jumping feels abit unresponsive at times, perhaps you receive the player's input through FixedUpdate instead of Update?  Regardless, you did a good job.

I really like the visuals and the menu, you did a great job there!