I actually made a game with a similar mechanic once, only more sports-oriented, but it ended up shelved. I can confidently say you nailed the execution here. Otherwise, it feels more like a single-player game, but a really cool one! I got totally hooked until my wrist started hurting after countless attempts to beat the throw distance record) The graphics and style look great, everything is super clean, awesome job. The only thing is the UI could use a little polish, but it's no big deal.
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