Ok so this game I feel it is a mix of ideas...
Gameplay: I feel that the gameplay is not what the start and cutscene reflect, I was hoping for something completely different, the gameplay doesnt match the character from thumbnail.
Art/Visuals: The cutscene art and the main character of the thumbnail looks increadible, I wish the game was about this guy! The art in the actual gameplay is something that I didnt understand too much, a blue square in a Sonic/Mario world, got me really confused not gonna lie.
Sound: Not bad, make sense since the character needs to go faster somewhere, but do not match the main character style of music.
Actual playthough: The camera gets really boring to use sometimes, if you fall after going fast, you basically start glitching on the ground and the square starts to shake nonstop like crazy, that is because you cant move the camera and when you colide on the floor it takes the position of the box to transform to the position of the camera, really weird.
Overall the game is not bad at all, but I feel this is a mix of idea and I think it will be way better if focus in only one!
If you want to focus in a chaotic gameplay where the cube needs to get faster to a spot, awesome, do it but make the whole game about it, I feel that the entrance cutscene was a bit out of place and didnt match the actual game. For a first game this is awesome, I am pretty sure that your next game will be incredible, dont give and keep up with the good work!