Time to brag a bit:
Several hours into playing VVVVVV for the first time, I learned the game in my browser was a leaked beta. I decided I’d try to complete the game then close the window and not play again until the final version is released. I wanted to get that final trinket, but must have missed it in my haste to try to escape the alternate dimension and return to my ship and crew. I did manage to get the hardest-to-get trinket of all in the triple-V tower, but was surprised to discover that the trinkets weren’t required to get the ship operational again. Of course two intermissions, a proper ending, and many changes later – who knows what the final version will bring! But do click the image below and view the author’s developer blog, and follow news of the game “VVVVVV” to its release.

Update: Demo of this game is available

Carl's first attempt at playing VVVVVV beta - win!