Witch & Hero is a great arcade styled romp perfect for short play sessions on the go. With a very addictive gameplay loop and a fun "protect the tower" objective, this game is a great hidden gem among a sea of indie darlings.
It's biggest downside is it's sharp difficulty curve which requires a lot of grinding to progress. The final (and only) boss is both infuriatingly annoying to defeat and a clever way in adapting the standard gameplay into a boss encounter with an unorthodox method in beating it.