I would recommend , if there's too gold buyable using silver.To make hard a lot's of silver to be needed to buy gold not money..

And another,
I love the concept and design of hover robot which flies long time..
Add some robot ,which looks can't be fat.😂

Pls...make maps also delightfull and make looking good.. add nice texture ....
Robots looks cool and mordern but some maps are so...old looking style...
And , add one robot that can make enemies come near to the player.....
It would be great.

And , teleportation place should be inluded at secret place hard to go... And ahoot enemies ...