Hello Thund !
I'm really glad you played my game and enjoyed it.
These are 3 good suggestions. I was working on the demolition part but ran out of time :(.
The lag is actually caused by the differents shaders and masks used for the revealing effect and fog/water animation. Its a technology I'm still learning and I will definitely improve that part over time :).
Yes I figured for the game jam it wasn't necessary to be able to save, the game is short enough. I removed cause it was causing issue with some cloned events.
Thanks a lot for your suggestions, I'll play your entry later. See you around and stay safe !