I escaped!
I was facing lags in the third level, which maked this one hard to beat. It seems the enemies are harder to just run through in this level, while in the 2 first levels shooting everything is the legit way but just running through everything generally won't get you damaged either, allowing to reach the third level quicker, but anyway I could not ever figure out what was going on here, I just randomly managed to reach the helicopter once in easy mode.
The game is very fun, the presentation is good and I am happy that you chose instant movement, thanks for sharing.