I actually enjoyed the game mechanics! Simple yet interesting, you could easily build on this idea, puzzle + platformer. You could easily do something like stopping rotating platforms with the cubes/etc.
I would even go so far to put like a maximum amount of platforms you can summon, take the timer away and this way make it more of a thinking game and in the end you could have star mechanic like Angry birds/etc, so the quicker and with less summoned platforms you can get 3 stars. I would instantly play that on my phone.
Loved the idea that you could jump and summon a platform under you, so maybe build on that!
One bug that I found that many platformers here seems to have is the jumping mechanic on walls. You can pretty much just clip on a wall, and then just start pressing space over and over again without any other keys pressed and you go up in the air fast. That is kind of cheating, since I almost dropped on the last jump and then just spammed space to get up the last wall :D So I would take that chance away from the player.
Although being very simple game, I loved the idea and would easily recommend this! Needs some visuals and audio though, silent games are quite dull in the long run. Put a nice ambient music on the background or just some nice music playing.