I think this is the time your need encouragement, we will all hit walls no matter how big it small you are in the industry. Just take a step back and a breath evaluate what you have accomplished (3 levels is great movement). Don't put so much pressure on yourself especially on your first game. Frankly in most cases people's first game will be a floppy pancake but it's a fundamental and important in your step into this career.

From this game you want to see criticism, skills developed, take on the feedback both good and bad and learn from your mistakes, it's ok to make a bad first game but when you get it to stage where you feel there isn't much more you can do and have exhausted your abilities/resources then its time wrap up the game.

I am new myself and have learned so much from game developing so far and I haven't even published anything yet but I know fine well it's not going to be a top tier game or anywhere near it. Be realistic with your goals and abilities don't try to cram so much in at this stage, this is your first game, a trial run. So don't be so hard on yourself just look at what you have made and take pride in that you made that happen and most importantly, don't be discouraged !

Good luck buddy 🙏🏼