Hey @knavels!
Thank you so much ! Well, I upload currently a new Version (1.22), and I edit also the Manual (former Readme). The Engine is very old (from 2005, but tweaked until today from the Bima Devs), but yes... the basement is from 2005. So Widescreens worked, but has some issues that you already find out. 16:9 and 1080p works the best. Try it out!
About the start.exe ... hmm strange it is a normal "batch" file (what you can edit too). But i made also a minor update there, but nothing fancy.
But thank you again, that is my very first game, made in 10 months. I try my best.