Great Job, keep it up! Here is my feedback:
-I am really glad you implemented music in the game, however I didn't like that the music is too short and repeating ,so try to look into this a bit more
-I also think the jump is a bit too high (it didn't make that much difference to be honest) but it feels a bit odd
-I also noticed that there is a location that lacks collision which lets the player jump out of the intended location, please check the attached image at the end
-I also think that the game is not very challenging, probably adding reloading or variety in enemies would really make a difference
-I also noticed that for enemies to damage the player you check if the player exists the area collision to damage the player again which actually bring up a problem that if the player didn't move at all no matter what he will never lose, check the images attached at the end of the comment , a better method to implement this would be by adding a timer during which is playing invincibility variable would be true indicating that the player wouldn't be damaged. (damage->timer->damage....etc)
Overall, Great game and keep it up !!! great Job.
