This is a slow-paced 2.5D platformer that very carefully emulates the look of a PlayStation game, except that it has real-time shadows that are a bit too good. I met the developer at the Debug Indie Game Awards in Nottingham, who told me that it was made in Unreal Engine.
Screenshots marked with 🍒 are created by syltefar and are considered public domain, free to use for anything. If you want to, you can note where you found it and link to this page.