Why not? While the Enter key is more convenient...
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I'm familiar with many games that let me press any key to continue, so I thought it would be better for players to use any key. Your game is simple and doesn’t need multiple keys for complex interactions like FPS games, where each key has a specific role (like Space for jump or R for reload). Since your game is simpler, it would feel better if players could use either just the mouse or just the keyboard, but currently, I need both. Letting us press any key to continue would make it more comfortable!