I've played Trance and liked it. The atmosphere is great, the history has potential and the boss was pretty cool to fight against, well done.
I think the normal enemies were not challenging enough, though. They were distinct, yes, and that's cool: the sword guy, the javeling guy, the spinning one, the shooter and the runner. But they were not challenging. Most of the time i was able to just run to them and stab stab kill, and they would do nothing. This, particularly, broke a little bit of my immersion, as it often seemed i was fighting with mannequins.
Also, i think some parts of the platforming are rather hard and strange, especially the one right before the first checkpoint, with the moving platform. In some parts, to, i could just take advantage of the invincibility time post-damage to ignore sections at all. This, also, takes away a little bit of the immersion.
Besides these little things, the game is good. Keep up the good work!
Here, i also recorded and posted full length gameplay of the demo. I hope it can be of some use.