This is a port, not a native build. So everything looks tiny. Think of it like a PC-ish aspect ratio on a smart phone, or watching DOTA on a 6 inch screen. If you have a smart tv, than simply mirror your screen and enjoy. Otherwise the experience won't be that good.
Price is also pretty reasonable. And yeah, it's not a one-time-purchase. There are DLCs and characters that you can unlock.
Or just play in PC, if you have it. The native game runs great on pc and doesn't require crazy requirment to do so. I think even a potato pc can play it. (Laptop too)