made it over 3000 points. most hits I got from enemies spawning right at me. This is really bad! You should either make it so they spawn outside the screen (or at least some distance away from player) or they should spawn in with a delay (first putting a signal that they are going to spawn at that location).
Other than that this kind of games now a days are expected to implement elements from Vampire survivors and alike to be fun - power ups, level ups, increasing number and variety of monsters and so on.