Hey! I think you have a good basis with this project, but to me it lacks a bit on 2 points : controls are hard to use and gameplay is a bit repetitive. So I would advise a few things : allow for keeping an input key (instead of double tapping to go from one side to the other), try to adjust the timing of the movement to the distance between objects on different lines (currently it feels very hard to follow the coins line), build a little bit more tolerance to mistakes (sometimes i went to the side and hit the box i thought was already passed me) and this kind of stuff! Gameplay wise some more variety to the level design could be cool, or a macro loop where you can spend your coins to get upgrades, or even something completely different, i don't know! Of course, all of this applies if you are willing to continue working on it, it is already an achievement to have made a full game in a month, congrats!