It’s a very enjoyable demo with super refined platforming mechanics. I often find that controls kill my enjoyment with a lot of 2D platformers/Metrovanias, but I always felt in control when playing.
My only issue was the horrific framedrops I experienced in the latter half of the demo. I don’t know if there’s a memory leak or it’s due to larger rooms with more enemies/coins, but I would get frequent drops to single digit frame rates when platforming. I managed to power through the lag, but only because I knew there wasn’t much left.