What is this 2D platforming game with green and blue flower-like stems?
Solution 1:
It's Geometry Dash, a "rhythm-based platforming game":
That's the result of searching for your picture through Yandex.
Solution 2:
It is one of the Geometry Dash games, namely:
- Geometry Dash
- Geometry Dash Meltdown
- Geometry Dash World
- Geometry Dash SubZero