Thanks for the useful feedback on jumping.
Some changes are now live that I hope will make it more enjoyable for you.
1) If you are off the floor when the laser passes, you should clear it. Previously I used a collision detection where your feet where calculated (poorly) to be. Cheating will still fail, such as standing on a chair, because it constantly checks your height. You will probably be able to jump over them while jumping forwards now too. I've left the advice to jump straight up because that's the safest way to complete the task.
2) If you just don't want to be noisily jumping around or have a low ceiling, or a bad leg, you can now disable jumping in the new "Gameplay" menu option.
There's not going to be lots of jumping in the game, but I felt it was an interesting mechanism to try and hopefully with the two options everyone should be able to finish and enjoy it.
I would be interested to hear from some of the players who struggled to see if it feels OK now.
I'd like to keep experimenting with new ideas, situations and gameplay mechanisms during Early Access. I hope that's what you want as well. Your feedback is important to help me get it right, or throw it out.