The comfortable sense of security of always having your portal gun at hand... The convenient sturdiness of weighted cubes... Have you been taking those for granted? Looks like you need a reminder that in this life, all things are fleeting.

Fleetingness is a series of maps that combine the portal gun on/off concept - created by FLooper and tuleby (CZ) - and futbols - created by Valve and TeamSpen210. By mixing two fairly unused concepts that weren't present in the original game, I wanted to provide the community with a refreshing and interesting experience.

Because the earlier puzzles introduce mechanics that are later used in more complex designs, I recommend you play these chambers in order. Though the first map remains rather accessible, the two others involve some pretty intricate solutions, and therefore are destined for experienced players.