- Nuts & Bolts is a free game that'll boost your IQ by unscrewing the nuts, boost your problem solving skills. Become a pro at unscrewing nuts and bolts while enjoying the exciting journey ahead. - Key features of Nuts & Bolts: + Levels: dive into 10.000+ levels, from easy to hard. Full of fun challenges and brain-teasing puzzles to keep your mind sharp and the fun rolling. + Boosters: use boosters to solve tricky puzzles. + Leaderboard: compete with players all over the world. - Ready to have some fun? Download Nuts & Bolts for an awesome puzzle experience now.