Great idea. Love the simplicity of a hole-in-one, and I think you implemented it super well. Really nice work for just 72 hours! Would've love to see some more whacky obstacles or craziness. Maybe a teleporter node that teleports your ball somewhere else or like a trampoline node that launches your ball into the air. Obviously, that's hard to implement in just 72 hours, but all this is to say, I think this game has some legs. Nice work!