Thank you for the feedback! i agree that the game starts a little too difficult, it is supposed to get harder as you progress but it probally shouldn't start like that.
I knew i needed to change something on the jump but wasn't quite sure what was it, thank you for pointing out :p.
As for the graphics, i'm not exactly the best one in art and i wanted to spend more time on the game mechanics, probally could give the player a border also but the main reason for the enemies having one is so you can distinguish how many of then are together.
Again, thank you for your feedback! This is a concept i want to progress further and i will remember these suggestions when making more content on it.