I had a good time exploring the various rooms, and trying to make sure I had not missed anything.
There did seem to be something odd going on with the movement, I'm not sure if it was intended or not. It didn't seem to consistently bring me in the exact direction I thought it would go upon keypress.
I also noticed that sometimes an artifact would spawn inside a set of spikes. Also, there was once where a set of spikes spawned halfway into a wall.
Overall good fun, and cute art and sounds.