Indeed there's a build with the option to punch without using the mouse in the description if you feel like trying it! :)
Initially we wanted to have enemies punch-able but we couldn't make it work since it'd trivialize most of the levels.
That level is done by punching the lever a number of times (3 is enough) and then rewinding twice as you go up. It's also possible to skip levels in the main menu (there's teleporters for each level!). I'd heavily suggest looking at the last one (9th level) since it may or may not be an epic boss fight! :D
That said, thank you a lot for checking the game out, i'm glad you found it good! <3