As mentioned in other posts, one design goal in Opac's Journey was to really emphasize the high-flying acrobatic abilties of Opac himself. We wanted to increase the "normal" parameters of platforming - and since Opac himself is a non-human known for his agility, it just made sense that he would be adept and be able to pull off some cool stunts.
Many of Opac's abilities will be learned as players explore the cave network and find the relics hidden within, but the ability to "blast" is tied directly to the caves themselves and used right from the get-go. (check out the screenshot - that's the peak frame of the blast animation)
While his normal jumping height is quite strong, Opac will employ the use of geysers (steam jets) throughout the caves to essentially blast upwards to great heights. Triggering a geyser will rocket Opac upwards more than double his normal jumping height.
Like most abilities, blasting will require some practice in order to learn how best to conquer tough jumps. Sometimes they are merely a means of reaching a high platform, but they are also needed to cross deadly chasms. Learning the correct angle to blast is key to a successful landing. Furthermore, combining a well-timed blast with other abilities like gliding and wall-sticking allows for some pretty impressive stunts.