Jumper (Project for practice)

I challenged myself to make 10 level for 2D platformer game. And add at least one new mechanic with each level.
It was made just to practice making completed project. 
All assets (sprites and sounds)  are free and were taken from https://www.kenney.nl/assets

You can play with keyboard or gamepad. 
Move - AD / Left Stick
Jump - Space / A
Interact - E / Y
Rope (unlockable feature) - Q / X

Be aware that the game can be frustrating sometimes. 
Some levels are just unfairly difficult. And there are some bugs. 

To kill enemies - you need to jump on them. But sometimes you will get damage from jumping on them. It was not intendent but it happens sometimes. 

Tell me what you think?