I made this android game and I uploaded and publish it. And I installed it my phone. But I can't see how many installs on its Google Play page?
Since you just uploaded it today, you won't see the number of installs yet. See the documentation where it says the statistics are updated on a daily basis. The statistics are not "live". You'll only be able to see how many people downloaded on a given day after the day is over. This is similar to Google Analytics. So be patient and check back later. Congrats on publishing a game.