Kiddos Puzzcade

In a lazy and mundane day, four children were playing in the woods. As night approaches, they realize they lost track of where the way back home was, and decide to try asking for help within the gates of a suspicious looking place. As they walk into the walled garden and search for anything that looks like a house, things get strange, and they see themselves trapped. That's when their bizarre adventure begins 
In each of this game's eight levels, you must alternate between the four children and interact with the scenery in order to open up the door that leads to the next level. Each kid has a special ability that comes in handy in different situations: 

Jack is a brave young buy who loves adventure and exploration. He's the strongest of the four, being the only one capable of moving heavy boulders around. 
Russel, the helmet boy, is an intelligent, but rather insecure lad who tries to avoid taking risks. He has a special... gift at breaking brittle rocks, one he still doesn't know is rather unhealthy. 
Anne is a tough and independent girl, she's quite a bit irritable, but always resourceful and reliable. She jumps higher than most kids her age. 
Marie, the ribbon girl, is the prettiest girl in school. Pampered as they come, she always has the most expensive things at her disposal. She might be fearful and spoiled, but she's truly loyal to her friends no matter what. 

HISTORY: This is a short puzzle game I made for a tiny contest in the long gone (and short lived) Foolish Forums community back in 2008-2009. I recently found it laying around in my hard drive, so I decided to give it a massive overhaul, fix a few things in it, and release it to a wider audience in RMN (hence the "1.1" in the title). This project is really old, so, if there are any problems running it in modern computers, please let me know.