Wow! I am shocked by the quality of this game; the graphics and quality are so smooth.
For the record, I'm playing with a touchpad right now so I'll update this once I play more with a mouse. I did notice if you're holding A or D while right-clicking, you can't use the jetpack, but that's probably a quirk of using a laptop.
Also I'm assuming it's intentional that if you saturate a wall with gel, some will come bouncing back at you. Adds to the challenge.
I'm excited to see how challenging the world becomes and how scarce the resources are. Hoping that I won't be punished too much for using fuel, as it's fun to aimlessly explore.