Wow, a great puzzle platformer! 

I found an error: when pressing the restart key more than once in a row, the game breaks.

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ERROR in

action number 1

of  Step Event0

for object obj_global:

Unable to find instance for object index 10

at gml_Object_obj_global_Step_0

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gml_Object_obj_global_Step_0 (line -1)

Great mechanic for this platformer. I think you did a good job scaling up the difficulty so the players can naturally progress to harder and harder puzzles. My one nitpick would be maybe make it more obvious how each block with grow? and maybe show what you have in your inventory in the order they will deploy just so the player has more information at their fingertips. But besides that, I loved it! Great job!

really well made sound and graphic design. Some levels felt a bit unfair in a sense, that I didn't know which type of platform I would get, or that I had to place them very exactly, or I wouldn't be able to complete the room, which is fine because I can restart, but after ten retries it feels more like a nuisance.

I really loved your game! The concept was simple but I think you did a great job implementing it into each level. You nailed the design of the IFPs. The art looked great and the sound of them blowing up was really satisfying.