Level

Levels are the main scenes in which gameplay takes place in. There are 100 levels in the original Slime-san game, and each level are categorized into five worlds consisting of 20 levels. Additional levels are available in expansion packs. An update was also added which added a Level Editor so that players can create their own levels.

Each level has a time set where the level must be completed in less than to obtain a trophy.

Some levels have a secret room that can be entered to interact with a character and earn a coin, but doing this prevents the player from earning a trophy, and the player must then complete the level by using the normal exit in order to get the trophy.