Good concept but...
Holy moly that is hard! I may have to have another try but couldn't get past first bit lol even though i tried 10 times or more. Maybe will try again later. Most times the other boxes either killed themselves or knocked me into laser beam but i imagine you need to have quicker reflexes to jump on them and make the leap in time before they kamikaze themselves.
As mentioned a nice little concept although difficulty a currently a bit beyond me. I like your different skins as well. Good little platformer puzzler reminds me or Lost Vikings a bit having to use the 3 characters in unison to get past certain parts in levels.
Nice job though!