The Balloon Quest is described as '"The Balloon Quest" is an ambitious 2,5d indie game platformer (PC&Mac) which will win you over with a lot of love for detail and fresh gameplay mechanics. The game revolves around the development of two little kids: a boy and his sister with her balloon'. There are more than 25 games similar to The Balloon Quest for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is Limbo. It's not free, so if you're looking for a free alternative, you could try SuperTux or Cave Story (Dokutsu Monogatari). Other The Balloon Quest like games are Braid (Paid), Hollow Knight (Paid), Ori and the Blind Forest (Paid) and Alex the Allegator (Free, Open Source).
Cave Story, or Dokutsu Monogatari, is a Japanese freeware Metroidvania side-scrolling Metroidvania platform-adventure game developed by Studio Pixel . It has been translated into English by Aeon Genesis Translations.
Alex the Allegator is a series of games that I, Johan Peitz, usually use for game coding challenges like Speedhack and Ludumdare. Whilst most of my games reside on Free Lunch Design, this is the place for the Alex' series and the even the source for these games. Let's go! Represent entire series of Alex the Allegator games including Alex the Allegator 1, 2, 3, and 4.
Super Meat Boy is a platform game developed by Team Meat and is the successor to Edmund McMillen's and Jonathan McEntee's flash game, Meat Boy, originally released on the Newgrounds website in October 2008.