I'll take you up on the swap — happy to test Space Puzzle for the full 14 days, real daily opens, not just an install. I also built PeerPlay, a free reciprocal-testing tool for exactly this Google Play requirement, so if you ever want more than one tester lined up at once it might save you some tracking. Send me the test link and I'll join today.
https://play.google.com/store/apps/details?id=com.testerhub.app