Gallium

Easy to Pick Up, Hard to Master
With the easy to pick up movement and controls, it allows anyone to learn how to play the game. However, the game is very dependent on momentum. You may know how to play, but you will need to master how to handle your marble.
Momentum is Everything!
As mentioned earlier, Momentum plays a very large role inside this game. For the best possible times, you need to be able to use your momentum to go arounds corners and go through every level as fast as you can.
Put Your Knowledge and Skills to the Test!
Go through the entire periodic table of elements with every element being their own level with varying difficulties. Some levels might need you to master one skill while another may want you to master another skill. Some elements are skill checks, so you may need to use several skills that you learned throughout the game to complete them.
Learn the Levels!
Some levels have checkpoints, but they are not required for you to complete the levels! Learn the level and it's layout to find any shortcuts to earn a faster time.
One Ball, but Several Possibilities!
You may only have one marble, but your marble can change its material and therefor, change how it handles and it's weight.
What Does This Game Include?
236 levels

Hard to master movement

Soundtrack made by, Moose With a Scarf

Several gaming elements that makes several obstacles

Achievements

Medals for achieving certain times on each level

Puzzles to find the fastest possible time to complete each level