The best alternatives to Space Mayhem are Out There, Z-Type, and Zenith - Space Adventure. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of Space Mayhem?
Agree.com— Free e-signature for everyone with invoicing and payments!
Solar Idle is a free idle iOS game that players buy, build, upgrade, and colonize planets - including the sun. Not only is it an idle game, Solar Idle features a build in arcade where players can play various arcade games to increase earnings.