Games similar to Go Ollie include Ardentryst, which is free and open source. Other options are Plee the Bear and Abe's Amazing Adventure. In total there are three Platform Games like Go Ollie for Linux, Mac and Windows.
Ardentryst is an action/RPG sidescroller, focused not just on fighting, but on story, and character development. Strategy as well as reflexes will be needed to overcome the game. The game is set in another world.
United Kingdom
Plee the Bear is a fun platform jump and run game, in which you're a bear, trying to catch his son, which ran away after he ate all your honey.
A scrolling, platform-jumping, key-collecting, ancient pyramid exploring game, vaguely in the style of similar games for the Commodore+4.
