Glad you liked it! Adding the sounds to pretty much everything we could think of so the game had feedback was one of the most time consuming things we did, because we don't have anyone for sound, so it was a lot of hours spent listening to free audio effects, we're really glad it's paying off.
Actually beating the game without double jump should be possible, although the first boss was designed around the double jump, since he goes pretty high on the wall. On our first demo of the game, the double jump was actually your special module, so we designed the 2nd and 3rd bosses around the possibilty of you not having double jump. However, our friends who tried it said losing the double jump felt really bad, so we made it baseline and added the repair module as a replacement.
Thanks for playing to the end, we're really happy you enjoyed the game!