Thanks for the great feedback! Appreciate it!
1.The double jump - basically I had to remake jumping in 10 minutes and I made the ground check a little to big so if you're close enough to a wall you can jump infinitely ;(
2.Batteries - it actually works how you thought, but I forgot to set the UI to an actual number after you power the elevator so it jumped back in when you killed an enemy and collected a new battery
3.Cooldown - I also messed up with time in the game. Generally time in game is running a lot slower than in the editor and the cooldown feels more fair
Sorry for the unbeatable one, the generation isn't perfect yet and you know: 3 days is not a lot of time.
Again, thanks for playing and your feedback very much, have a nice day!