Penguin was a small tile-based puzzle game I first made in my senior year of high school to help with college admissions. It was based on the sliding ice puzzles of Pokemon's ice caves. The player controlled a penguin that could walk over ground, and could slide over ice until it hit an object. The goal was to reach a door at the end of the level. Solutions involved paths that crossed over themselves multiple times.
The project was done using Processing, a thin wrapper language around Java. It took approximately 20 hours to program and create assets. Unfortunately, the original copy has been lost over the years.