Somehow had to play it again and I think I played it 100% now. It's just really cool and the endboss fight on eastern tunnel is just amazing. So much to discover! I have mixed feelings for starting all over again all the time, somehow it gave the game a rogue like feeling which i like but also it felt a little bit tyring after a while. Maybe let the player restart after the first few intro rooms just before you met your friend Byrne or Bryan?
Awesome game, 5 stars