It wasn't hard, but the spell-casting is a bit picky, so if you put it a bit too short or one side a bit too long (thunderbolt) it will not cast.

The first few stages are easy, but most of the time I lose lives on the vampire squid. When it does the fast attack I can usually stop it, but when it shields it's a bit hard to draw fast enough while making sure the spell will cast. If you mess up one, then most likely you lose a life. Thankfully, all the health values for the ghosts are predetermined, so I definetly won't lose a life to the fast attacks, and are ready for the shielded ones. The first shield is easy to get through since I noticed that swiping down spells are a lot less picky and faster to cast. I lost lives a lot of times on the second one though.

For the anglerfish, to beat it without losing a life is hard, because of the massive amounts of lag. Since it has about half a second before the spells update or even show if they are valid, it's very easy to accidentally have a spell become invalid and not know it until you've already casted 2-3 spells, and going back puts you off the beat. It's actually a lot easier just to take it a bit slower on the anglerfish, it's attack takes a bit longer than you might think, the first two parts of the fight are reasonably easy, but for some reason every time in the third stage I miss a spell for some reason, but am still able to defeat the boss just before the mouth covers the whole screen. I recommend playing it without sound because the pressuring music would likely make you mess up.

For the final boss, the first phase is pretty easy, like I said, if you don't panic and make sure your spells are valid. Don't panic, because when the boss sucks the ship in, you still have a good 2 seconds before you lose a life.

The second phase is the hard part. The minions are no problem, but it sucks you in so fast it's hard to actually dish out enough spells to avoid losing a life. Though if you were playing normally, it would be very easy because there would be the ghost that gives more hearts around, and the boss spawns a lightning ghost, so you can regain health before the final stage. To do this without losing a heart, I had to memorize the first few spells that I needed to cast. It was still very hard to do because the boss is just so fast. But it's a generally easy game, Magic Cat Academy 2, so I could get the whole game completed without losing a single life in about 30-35ish tries.