I really like how this game is turning out! There are a few suggestions that I have but they aren't really a big deal. One thing I think that would be cool is if the R key reset the current room. A basic level selector that displayed your times and amounts of grabs on each level individually would be nice aswell and it could even have a ranking system where the amounts of grabs and time play into your rank; maybe for an S tier rank you'd need to get the minimum number of grabs and the minimum time and then lower ranks are just the same time/grabs added or subtracted by a certain amount each rank lower.
With the switches I think they're great but I think it'd be a bit better if the levers and arrow thingies had colors which differentiated the two different sides the lever can be facing. That additional color information I think would help me remember certain information about the level.
Anyways, you've done a really good job on this game so far and I'm happy to continue to see it be improved upon. Keep up the good work! : )