Along with Botanicula being brilliant, for those picking up the Humble Bundle, do yourselves a favour and be sure to cough up more than the average to get
Kooky. For anyone who hasn't seen it, it's a full-length movie that's six kinds of awesome. Far better than many theatrical releases I've seen. And although dubbed from the original Czech, that really doesn't matter since most of the characters' mouths don't move anyway, and they picked some excellent voice actors.