Did you try clicking on one of the actions (swap colours, get hint) when you couldn't deselect anymore? If so, did that work? It would help in determining if it is a more general input error or just the deselection.
Since you're on windows: did the sound effects and the music play properly or did you experience stuttering or crackling?
I will update the how to play with your suggestion, thanks, although only after the voting ends to pay respect to the deadline.
Yeah I think I really did click on the selected block to attempt to unselect it. I was frantically trying to unselect it using different methods for a whole minute before just giving up and watching the game slowly end. Which was actually nice cause I got to see a bit more of it, the most time is spend looking at the left. And the nice portrayal of the underworld on the right can sort of be ignored. I suggest you also just disable a block that can't move any direction? Maybe give it a a little shake and a soft *kegh* sound when you try to click it anyway. :)
Audio worked just fine.
I'll have to think about it. It might confuse users if you can't click a tile you are usually perfectly allowed to click. On the other hand, it should be a very rare case. I can't actually remember having consciously seen any. Another possibility would be to automatically disable the current selection when clicking on a tile you can't swap with, but that could also lower the "fault tolerance" in cases you, for example, click a little too far away. Auto-deselection would force you to click another two times to actually do the move you intended, not just once.
Glad the audio is working, though!
