Liked this one, ran into a bug where I couldn't tether the dog but overall nice music / sfx and good level layout that act more like "puzzles". Nice job!
I believe I had tried to beat the second level, the dog died from falling into the spikes over the ice that disappears. Then it reloaded and once I un-tethered him I couldn't re-tether.
Platforming was good imo, controls were smooth and it played well.