Looking for a challenging game with simple gameplay to have quick fun? With its simple and 2D graphics, OOval offers many ways to challenge your reflexes with its unending level design. All you need is a mouse to play and you are set. Use your left mouse button to change circles. Collect as much as gems you can to spend when you die. Avoid the enemies, time your clicks and try to reach a high score and then beat it! You can't spend infinite time in some circles as they get smaller and smaller as you spend more time in them.