Nice idea to do that mechanic with the slide jump, its was cool to try to adjust the slide and see to where i can reach in the level.
One thing is to maybe make the control more responsive, i see that some users tell you about the GetAxisRaw if you are using Unity, so that may help.
And other thing is that sometimes was a little frustrating to don't know what blocks were fake. But maybe that part of your idea of "try - fail - retry", so in that case it's ok.
Congrats for finishing the Jam and creating this great game!