Metal detector game 1.4.1.7 [free]

It is a game about looking for things with metal detector.
You can find things and receive some money and buy upgrades, new metal detectors.
The game will be developed.
It is my first project.
I will be grateful for all the opinions. They will help me in creating new updates.
If you found bug, please write about it to me!
You want to help with testing the game - Join the beta testers: https://play.google.com/apps/testing/pl.MarceloweStudio.MetalDetector
Thanks to users:
- LikeYourBike (general help creating game, photos of most items)
- 19neuro92 (help with game improvement, photos of several items)
- modelsky22 (help with game improvement, photos of several items)
- Jovan Nikolic (help with game improvement, photos of several items)
- Kamil Langier (photo of one item)

• 03/05/2019: Metal detector game 1.4.1.7
• 05/21/2018: Metal detector game 1.4.0.0
• 01/13/2018: Metal detector game 1.3.3.0
• Report a new version