That will depend on the requirements and compatibility of the specific games you want to play. We recommend you check with the game's software publisher's web site for their compatibility with Windows 10 Home 64-bit operating system and the minimum/recommended hardware requirements (Is a Graphics card required, the processor speed and the minimum required system RAM and the minimum available hard drive space) to run their program, then compare those requirements to this system's configuration. With regard to screen size, that would be a user preference.

The Lenovo IdeaPad 320-17 needs a 65W AC adapter. Here is the link to the proper adapter: https://www3.lenovo.com/us/en/accessories-and-monitors/chargers-and-batteries/chargers/PWR-ADP-BO-65W-AC-Wall-AdapterUL/p/GX20L29355

We recommend you check with your local Best Buy location in Hato Rey, Puerto Rico for availability of this model.

Just use the HotKey in the F6 position to turn the Touchpad back on. There was a recent Windows 10 update that changed the default setting for the Touchpad to off when waking from sleep mode. The HotKey in the F6 position toggles this feature on/off. You can update the Touchpad BIOS/Driver by following the link below to look for new driver updates for your specific system. Use the "Update Your System" feature to be sure you get all of the BIOS and drive updates for your specific device. As always, be sure to create a restore point on your system before you make any changes. You can do this by just typing "restore point" in the search window within Cortana and follow the link to create a restore point. If the problem persists, we recommend you call Lenovo Tech Support at: 877-453-6686. Here is the link:
https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/yoga-series/yoga-720-12ikb?linkTrack=Homepage%3ABody_Search+Products&searchType=3&keyWordSearch=Yoga%2520720-12IKB%2520Laptop%2520%2528ideapad%2529