This is good work, considering the fact that you're in primary school. The controls are really smooth and responsive - I've played many, many games by experienced developers where the controls are horrible and it makes the game really unpleasant to play so well done to you!
I can also see that you really put a lot of thought into your level design, with lots of variety and experimentation, plus a few tricks! That is also really excellent work.
I laughed out loud at the ending too!
Please ignore the person or people who are giving some of the games low ratings. This is a jam and people shouldn't do that. You did really well. I hope you enjoyed making the game. That's what's most important.