Surprisingly for such a small level, Forestidia's solution is a backroute (which might have made it more fiddly than necessary). I'll fix it by increasing the spawn interval a little and post an update. Nepster's solution is intended, modulo a minor difference which I don't care too much about.
Icho's solutions are the same as the Forestidia's and Nepster's solution.
I've solved Proxima's level. Wasn't immediately obvious (also, the fall looks a bit like a splat fall due to the large zoom), but I managed. Nice one.