Good potential, gotta see how it 'gets dark', though I'd say the Mosquito attack/defense pattern of spamming Z is kinda 'Meh' ? I suggest later-in to maybe make it similar to the Light beam attack and have it hit/miss depending on messing up a 4-button-timed prompt like the Light Beam, cause 'Pressing Z' to avoid the attack is - impossible for it to actually hit you/do damage, and primarily a "Again? Wasting time-type of non-threatening NPC". Though, if you made it so you had to press 4 buttons and 'messing up = it hits you' or not able to do the button prompts fast enough = Get hit probably much more engaging