Thank you for playing! Yes there was/is lots more content planned and we're hope to release an expanded and more fleshed out version for Halloween.
As for the spelling: I totally missed that tree would be something valid to spell. I don't want to spoil it here just in case someone reads the comments first, but I'll have to rename the task to something like "Spell out a 12 letter phrase" and additionally to the hints in the game potentially add the hint "Halloween"