Ok so I decided to see if this might be something I might install...sadly it isn't my "cup of tea", BUT I decided to watch the vid anyway and read whats on the stores page on the off chance I might see something I can relay back to you, and here it is...there appears to be use of a non english language in those screen shots...so you have an english title and a description in english, but a different language throughout the game(Vietnamese I think)? I cannot say everyone who visits TGC is english BUT I can say the majority write everything in english while using the forum so you might want to consider that there might not be many here who can speak/read the language in use throughout, if you have an english title I would suggest you should have english throughout at the least.
Your description reads
"Racing Game You Can Play Every Time For Kill Time
Collect Coin And Buy Some Stuff From The Shop To Make Your Game More Interested"
You don't need to capitalise every 1st letter of each word and if you insist on using english then it might be better to write:
"Racing game you can play to kill time, collect coins and buy some items from the shop to make your game more Interesting"
It is not clear what you mean by "collect coins for the shop"...you appear to have in game purchases but you are also collecting coins throughout as what appears to be the main objective? Confusing. Requires further clarity.
Also when someone reads "racing game" they expect a racing game, I mean there is a lot of jumping and aided flight, and nothing to race against except yourself(ie time) based on the video. This is more like a platformer runner game I think, I am no expert especially when it comes to using industry terms, others here will be though. I am sure they will chime in at some point. I tend not to play games like this and so I am not the best person to guide you further.
"This app is not available for any of your devices" This isn't what i was expecting to see...I have 3 android devices, 1 doesn't have the right OS but the other 2 are android oreo 8.1, one with a gig of ram the other with 2 gigs and both released in 2018 - samsung galaxy J4+ phone and Alcatel 3t 8 tablet. Based on what I see in the video both my devices should be able to run this easily and have plenty of resources to spare. This i would make priority, if only a few devices can install it then you have serious problems.
Finally I actually couldn't find your game on google play using my device, but a search did bring up a number of very similar titles with 5 exact matches belonging to others and this was not all most likely - I only scrolled down 3 times to find these 5 before results didn't even include either race or shape and your's didn't show - maybe it is an option for development ie you have it set up for testing so not publicly available yet? You need a new title regardless plus there are many variations that sound similar ie ShapeRace, Shape Races, Shapes Race,. Shape Race Game etc etc, you would want your title to stand out right?
Hope you find this helpful
Win 7 Pro 64 bit SP1, AMD A4-5300 APU 3.4GHz, 8GB DDR3, NVidia GeForce GTX 750 1GB GDDR5, ASUS A55BM-E