Mini Golf: Retro
If you love the idea of classic retro games like Minecraft or "Pixel" titles, check out Mini Golf: Retro.
This game has neat old-school "retro" graphics that are 8-bit, tons of hard golf courses, loops, distractions and obstacles for you to deal with. Hit the golf ball hard enough and it'll hit crazy jumps and the cartoonish graphics come to life.
You'll try to stay under par, but chances are that won't happen. Work on your golf swing, try again and enjoy this game without spending a cent.