This game was very well-made! I loved the effects. The jumping and move mechanics worked very smoothly. Usually platformer games the hitboxes are an issue, but for this I thought it was very fair. I liked the theme and the atmosphere as well! The GUI for conversations was also very well done! I can very much tell a lot of effort was put into it and I really congratulate you for being able to do a game as a one-man team! Definitely requires a lot of dedication, time, and effort for sure. I also loved that you were thoughtful to include different languages. Me personally I am a huge language-learning lover. So I found it very nice that you incorporated that into the game as well. I also liked the fact that you include kids as an audience for your game. I thought it was a nice way to tie into easy and hard mode. The adult mode at certain parts were very challenging and took me a while to pass through, so if I were being nitpicky I would say scale the difficulty down a little bit. But honestly, what's a game without a little bit of challenge!
Overall, wonderful job! Thanks for making this game, I enjoyed it a lot!