I can't recommend Glitchspace, but, then again, I dislike most platformers. I got it because I was at a stage where I wanted to check out how programming/hacking was done in different games, and, from that point of view, Glitchspace filled its purpose, but, as a game, it wasn't my thing. My dislike for platformers might be because I'm bad at them, but a good platformer, in my opinion, is one that makes me want to push through and improve. I have played like a handful that manages this (and even made me enjoy them), but Glitchspace was not one of them; the "hacking" part was not enough and there are also far superior games for that.
Dark Train, on the other hand, is a game I can really recommend. A very specific part of it was like trying to eat soup with a perfectly good spoon, but where the spoon always insisted on pointing the wrong end towards the soup no matter how I tried forcing it not to, but the game, as a whole, perfectly made up for that and made me want to learn all the tricks and overcome the challenges. I was also surprised at how much exploration it offered. (free demo on itch)
By the way, what's that other side-scroller game where you also manage a large vehicle with many rooms hidden inside? I think the vehicle was like a ship (instead of a train), maybe a side-wheeler, but wasn't always in water.