neat game, i liked the concept! sort of like Factorio-lite time trial :) there's a lot that can be done with it, imo
one thing that it definitely needs is a tutorial though - yeah, i know, time constraints and everything, but this game is quite mechanically-dense, and a quick tutorial would go a long way to clear some of them up (eg it took me an embarrassing amount of time to figure out how to rotate stuff)
also, having to press the right mouse button to place and the left mouse button to destroy is kind of counter-intuitive to me - there was many a machine i destroyed by accident lol. this, coupled with the time pressure, makes for a rather stressful experience :D