Thanks for the feedback! I'm not sure why you were getting the funds ending game issue - there are separate endgame messages for running out of funds and running out of time, so if you were getting a message that wasn't indicative of your ending situation, it was probably a bug, Although I've tried a couple times and couldn't replicate that.
Time/Speed balance is definitely something that needed more time, with only one day to test after completed mechanics, I didn't have enough time to perfect the balancing of time, build speed, wages, and build time. I realized too late that I left the rotation controls out of the tutorial XD, and yes, a full version if this game would definitely need a more refined hover/selection system.
Your strategy is similar to the one I found to be the best, usually I would hire another, low skill engineer to work on the rear booster for a few days, then fire him as soon as he finished. The concept of the game is to be a strategy sandbox out of which many strategies could emerge, and while a week long development didn't allow for implementation of THAT many possibilities, a full game would have more moving parts, not allowing for time where the player must sit and wait for building to finish.
Thank you for your feedback, I appreciate it a lot!