Hey Majima,

If you click the "Support" tab on the right (from the full web version of the forums) you'll get our support portal, which has, among other very helpful tidbits, this article about Android installs: http://support.spacetimestudios.com/...-on-my-android

It's probably your market cache that needs to be cleared. Follow the steps and see if it doesn't help you. If not, create a ticket and our support team can follow up with you.