Hey, thanks for the detailed feedback - yes the big jump was intentional, given the variety of options I ran out of time to properly adjust the energy economy, at the start I wanted you to worry about your energy with the end of the game being more free to do as you please, so glad that worked out. Yes constraining the mouse would have been a good thing to look at and one I did not consider to be honest.
Thanks for playing and persevering and again thanks for the feedback