Tetron is a decent game to me. I feel like it has the potential to be much better than it is. The boxes move too fast and always seem to move towards the ends of the screen, rather than me moving them right where I want to move to. I'm also confused with the game's objectives, am I supposed to connect as many boxes together in one go or connect a certain amount of boxes to increase the score? In general, the gameplay has really cool concept of a puzzle game but just lacks the execution. But I do love the art and audio in this game, it definitely makes the game have an NES feel to it. Just keep practicing using Godot more and you'll make much better games in the future. Good luck!