Amazing concept! Seriously, needs to finish this thing up ASAP. There are a few takes, however. The graphics is a little 'old fashioned' in today's world, the timeline is hard to keep with and has no memory - for example, when you do something and restart, the timeline needs to keep your last change or otherwise the player needs to find ways to remember what and where they put elements.
Do not introduce all mechanics at once. For example, introduce the jump, let the player play a bit with it - maybe master it a little - then the speed up, then timer, then flip, etc...
You also need a button to stop and restart the level, because waiting when you know you didn't do well is not a great feeling :) Tie a score / stars with speed of solving - this would increase the replay-ability.
Take it mobile! But this means making controls easier :)