This is an old flash game that was made in 2009. It's a Mario game that plays like Lemmings and I just beat it today. There's 24 levels. Some of the levels were weird, where the exit is right close to you and yet you see another exit with more obstacles to deal with. Why go to the one with a lot of obstacles when there's one right in front of you? What makes this even more weird is that this wasn't even one of the early levels. There's 50 Mario on every level and all of the levels has a 100% save requirement, so no Mario is allowed to die in this game.
There are 15 skills and I will explain what they do from left to right.
Pipe: Allows one Mario to go inside of a pipe and come out from another. Think of the teleport from Lemmings PS3.
Cape: Makes Mario glide down.
Builder: This looks like those little fence that you see in Super Mario Bros. Mario will put five of these horizontally and all the Mario can walk on it. In some levels, this skill has a problem. If one Mario is in the area where the fence is going to appear, that Mario will explode and die.
Climber: Climb up ropes then jumps to a near by terrain. The terrains can't be destroyed by the way. Only the sand and the yellow blocks.
Piano: This is the blocker. The Mario that is playing the piano will make all the other Mario behind him stop and dance.
Fire Mario: Gives Mario the fire power.
Fireball: Only the Mario that has the fire power can use this. It makes Mario shoot a fire at a Koopa.
Small Mario: Fit through small holes.
Pickup: Lets Mario pickup red grass that contains a bomb and throw it in front of him. This is the most annoying skill in the game, because there are levels where you need to pickup the bomb at a certain pixel in order it for the bomb to drop down and break the blocks below.
Duck: Makes Mario duck down to avoid a bullet bill.
Run: Increase one Mario's speed.
Frog: Mario needs this to swim on the water or he'll die.
Tanooki Suit: Mario will fly horizontally and will not stop until you give him a different skill. He can turn into a statue to avoid bullet bills.
Raccoon: Same as Tanooki, without the statue.
Digger: Dig down to remove sand.