Game is very easy to access, being embedded within a browser, good work. A game that meets the requirements of the brief and some nice visual assets. Feedback when collecting items is a nice touch, both in sprite change and text bubble.
I feel that the game could have benefited from some enemies or an obstacle to overcome. With subsequent levels with increasing difficulty, it would have been feasible to have a game with a decent amount of longevity to it.
Overall, there isn't a tremendous amount to say. For your first game submitted it is entirely serviceable, but there is room for improvement to provide a challenge. Good effort nonetheless.