Source code of the Jellify game made by Simon Marynissen and Treazer, which can be played at bonuslevel.org. The level editor source code and extra resources can also be found on Github.
The actual game is built using FlashDevelop 5.1.1.1 for .NET 3.5 (master#16708dca57) together with Flex SDK 4.6.0 to target Flash Player 21.0