I'm glad you liked it :)
The hotboxes can be finicky to be fair. I think the down swing could be wider alright and it's definitely something I need to experiment with more. Hard mode only has one level tbf and I've only beat it once lmao. Zooming out should definitely be an option but I had mostly small levels at first and hadn't thought of it.(Mainly because when making it I was able to see the whole level haha)
Anyway, thanks for playing and for the feedback!