Mouse.
Four game modes are available: * Classic: Take your time to solve and reach 1000.
* Speedrun: Reach 1000 as fast as you can on an unique grid to compare your time with the world!
* Time attack: Reach 1000 in a limited time: Be smart, Be strategical and.. BE FAST!
* Daily quests: each day, four quests are proposed to challenge your logic skills.