It took me like 10 runs to figure out that the dash distance depends on the cursor position, after that I could at least last more than 5 seconds. An indicator for that like an arrow from the player to the cursor would have helped. And I didn't notice any difference between normal difficult and hard. Are the enemies faster? What would have been really difficult was if each of the curses shot had different speeds. Also being a score based game, I couldn't even one time look at my score, and once I lost the score was gone, so at least showing the score in the losing screen would be cool.
Congrats on your first GWJ!