This game reminds me of one browser game that have literally same gameplay focused around ladders. Im unfortunately don't remember the name of it, only thing i remember that browser version was demo and full version was been in Steam Greenlight, but never got a full release. Definitely about to try this one. Upd. Found that ancestor, called "Flightless", you can find it on Nitrome website. Demo might be still available on same website, but a full game was cancelled when Steam Greenlight was closed....

Is the demo already out, like mentioned in the trailer? If so, I don't see the download button.