Left and right arrow keys and A/D to move left and right. Use the block (you) to stop the dots (methane) You can click on the dots to stop them as well. I recommend clicking at the beginning to get some score to survive the first wave, then transitioning fully to moving the block. If you are really good, try both at the same time; clicking at the bottom, and moving the bar at the top. The dots CAN travel through the variable thingys, make sure to be aware for that. Make sure to look at the stuff behind. Also, make sure to have fun!
:)
