Could not make myself to finish the game without using an auto-clicker to boost damage greatly, kills the boss head in 3 seconds with the upgrades. The next two times I died to the boss because then I reach him I have minimum health even with the cheat. Before the cheat, I had damage 20 and health 240. Without cheats, I can reach the boss but cannot kill him and the upgrades are too grindy at that point.
The things that mess my runs are the red flying monsters blend in with the environment and the coins. I cannot predict when the clouds appear, making leaps of faith. And the monsters cannot be hit when they are in the same place as you. For example, the red phantom spawned by the finger monster sticks to you unnoticed, I even thought it was my wings.