(no I did not work on the game but I do like it and the current state of the game is good)
I made it to stage 14 without losing a single life, the difficulty is not too high, and this is an arcade style game with increasing difficulty and no end, so saying "The difficulty is too high" doesn't even make sense
but if you look at the options you can see there are cheats available, they disable the high score but they are also fun to mess with,
if you want to know what this game is based off of go play the Galaga or Galaxia arcade games, they are super easy to find online