Unofficial contest: Obstacle ideas

Jump and flip!
For the robot manager only the OUT14 (jump feedback) is used.

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Do you have an obstacle idea for my level? This is your opportunity! Publish here your idea before September 10th*. The three best obstacles will appear in my level!!

These are the rules (I have simplified them):

- Your submission should be a derivate of this level
- You can't change level size
- You can't move default spikes, but you can add more
- You can't use Lua
- The level must have up to 250 objects (if your level isn't laggy when you put 200 you can add more)
- The level must be possible (of course!)
- Don't erase robot!!!
- Don't try to avoid these rules! :)
- You can't use the following objects:

Sticky note (I have already put 7)
Bombs
Event listener
Key listener
Gravity manager/settler
Lua script
Interaction objects (unless they are in a closed area) excepting cursor field/finder
And any other object that could alter the entire game

Remember: Limit day is September 10th. *If there are less than 3 submissions towards September 10th the limit day will be September 15th