Four remotes must be collected to complete a level. Since there are only three missions, only three remotes can be found. The fourth remote must be earned by collecting 100 flies in the level.

After completing training, you will get a bonus and another door will open in the Gex Cave.

There are four glass walls protecting items on the top level in the Gex Cave. Jump up and kick the glass to collect them. Note: This may require a few jumps in order to get correct timing to break the glass.

360

Press B to do a tailwhip while jumping.

Nose grab

Do a flying kick (hold R and press A).

360 nose grab

Get a large running start and do a 360 and nose grab. You cannot do them at the same time, but can get them both in one jump.