First impressions are often a good indicator of quality. Sometimes, though, you need to look deeper than a first glace. Sky Taxi is one great example of not judging a book by its cover.
When the game first starts, the exposition is displayed in poorly-sketched comic book panels, with very awkward English. The premise is completely transparent, and nothing seems to really make sense (something about fairies being abducted by aliens, you being a mouse/rat creature named Mich, being the rookie of a group, yet you're the one they send on a mission, and coins or treasure somehow come into the mix).