Download and install LDPlayer on your computer
Locate the Play Store in LDPlayer's system apps, launch it, and sign in to your Google account
Enter "動体視力反射神経アップ 10秒で年齢測定開始の脳トレゲーム!" into the search bar and search for it
Choose and install 動体視力反射神経アップ 10秒で年齢測定開始の脳トレゲーム! from the search results
Once the download and installation are complete, return to the LDPlayer home screen
Click on the game icon on the LDPlayer home screen to start enjoying the exciting game