Hi vuphan!
Ah, I see! Thank you so much for the gameplay video! I understand much more clearly now.
Wow! You went through every single entry?! Amazing! Whether or not you believe it, the scale of a project does not equal its level of fun or playability. The larger the scale of a project, the more room there is for bugs or imperfections. This isn’t to take away from anyone who has created a large project, but simply to point out that it is okay to stay within what you feel you are capable of, as you know and come to learn your limits. Look how simple Flappy Bird was, and it amassed millions of dollars! You used your own creativity to produce a project that you can be proud of, that you have learned from, and that you enjoyed!
Now that you have learned things that you haven’t known before, you can challenge yourself a little more and more - until you reach the point that you are able to scale up your projects! Never be afraid of a challenge. Challenges are what lead us to growth! 
