Clever puzzle, not very clever me solving this puzzle. Nice to hear you adding more levels. Especially would be fun to see some with more than one solution possible.
Here is my playthrough (warning: I have no idea what I am doing):
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Thanks for your video! You seemed to have trouble with bouncing and aiming which will be made easier in updated versions. There is already more than one solution for Level 4 where you can beat it without killing the enemy at top (and theoretically you could beat it without using that enemy, but it would need exact timing).