- Level 4 also introduced secret obstacles. In the first time the Desert theme was shown in the level, you could see a row of trees while the player was going through some blocks. The trees are the trees normally used in the Forest theme.
- Level 4 is one of the levels shown in the trailer, the other two are Level 1 and Level 3.
- Level 4 is slightly harder than Level 1, Level 2 and Level 3