The grappling is fun. However, it took me a long time to figure out you can wall jump so I couldn't even start playing for awhile.
What is the resource you collect from enemies?
The jumping is really floaty for you and enemies. The gravity could be turned up.
In the third room, there is a huge wall I can wall jump up. However, the wall reaches the very top of the screen. I can get up there but can't get back down and die for an unknown reason.
The combat is very slow and clunky due to how long it takes to charge up your attack.
If the grappling is focused on, I could see this being really fun. The wall jumping is probably unnecessary since it means you don't need to grapple in situations where there is a wall.