User blog comment:TNY/Ice Breaker iOS/@comment-4652747-20120713015703

1. A

2. B

3. A

4. Markus Heinel. This looks a lot similar to the Cave Chaos 2 background, but if I had to make a second choice, I'd choose Martin Wörister, but I'm guessing that for a game of this size, it's more than one if not most of their pixel artists.