The only praise I have for TerRover has to do with its presentation. For starters, it looks great. It's got a pure color scheme and sports a similar aesthetic to games like LocoRoco, Patapon, and PixelJunk Shooter. It really looks fantastic. The TerRovers themselves look like they've been pulled out of photo negatives; they stand out quite nicely against the environments they (struggle to) traverse. Their faces animate appropriately, and they will often be mirror images of the faces you'll be making when you get hopelessly stuck in a cramped tunnel or blown to pieces by a swiftly-moving cog.
TerRover sounds as charming as it looks. The TerRovers sound like remote control cars, which is a good fit for their simplistic designs. The soundtrack is above average, but it's nothing that will have you shopping for an expensive pair of high-quality headphones. It's functional, but forgettable.