Fair Warning - This is the biased opinion / wall of text from someone bad at the game, so take everything with a grain of salt.
Fun game so far, and I've really enjoyed the Muffet section / scenario. The whole thing felt like a fair challenge.
However I feel like the Toriel section is not as fun nor fair, and the fight has a few attacks that just feel far overtuned.
- The multiple belly slap attack can spawn enough projectiles that you get stuck in a corner or some place where you can't actually avoid them at all, especially the later one where it fires a bunch at you since the first shots will be falling down whilst she is still firing at least one more.
- The constant rain of orange fire along with the acid bubbles does not work well on keyboard and mouse since pressing the keys wrong counts it as you stopping your movement, which means no matter what you do you'll take a hit from somewhere. But additionally the acid bubbles feel like overkill on the attack.
- The white fire stream attack - the one where she is firing lines of fire like a flamethrower, and has acid bubbles rising up as well - also feels nigh impossible to avoid getting hit at least once or twice.
- The fast falling individual fireballs along with the rising acid bubbles also feels a bit too much as well with the fire falling down faster than you can move around unless you're speed-boosted, and the acid bubbles rising in just the right way to usually make you eat one or the other when trying to dodge.