Thank you for the positive and detailed feedback!
Glad you appreciated the time I put into menu design and the tutorial.
On the controls aspect, I think I might add an option to change how the thrust direction works; I'll keep the current one and add one where Thrust direction is always in the same direction (i.e. W always up).
Now that you've mentioned it, removing the long description of Techs from tooltips, and just keeping it on the Unlock popup might be a good idea. Makes it easier to see what Techs do when browsing.
Happy to hear you enjoyed it overall!