I like the idea, while I won't change it to the default for levels I'll definitely use it for some.
Maybe some sort of story mode in future could use it. I just thought of Contra for some reason.
I look forward to play your future demos.
I did not watch it until the end, because I did not want to spoil myself, but it was fun. You really are a one man army. I knew the walls were destructible, but I never thought to use the shield gun to mine myself an escape route.