Growblock by Zencha

Rules:

You are the Blue block.
Collect Green blocks. They make you bigger and give +1 point.
Avoid red blocks. They halve your size and points.

Controls:

Up to move upwards
Down to move downwards

Options:

1 for easy mode (12 Points).
2 for medium mode (18 Points).
3 for hard mode (21 Points).
4 for insane mode (25 Points).
5 for zen mode. No win condition. How big can you get?
B to restart game
S to toggle sounds on/off.
X for only SFX (Pro tip - 5 + X = ultimate zen mode).

My first ludum dare and 3rd game every made. Enjoy :)

Themes:

Growing - the block grows as you get points.
Two button controls - up/down to change directions.