I’m very sorry to hear the game was so bad for you. I admit, the map system does need a whole hell of a lot of optimization that I simply couldn’t get to during the jam. I know on my development machine (which is an i5-8500 w/ GTX 1050ti) I could just about feel the slowdown when transitioning regions. On my laptop (i7-6700 w/ intel graphics) the lag is a lot more noticeable but still playable.
I really appreciate you giving the game a try in any case! Thank you very much!