GST Provisions on service provided related to Vedio game service in a mall by a Taxpayer

Query..
A taxpayer who is providing service of Vedio game to customer in a mall. He charge consideration depends on time consuming such as
for 1 Hour = 100
2 Hour = 200
4 Hour = 500.
My Queries are as under
1. GST rate on above supply of service ?
2. How to make Invoice for the same?
3. whether GSt leviable on Entertainment Tax also.?
4. can I take ITC on input / capital goods / input service (installing of game in computer) the same with outward tax liability..!??

Thanks & Regards
CA Abhishek Sharma