I love this series and love the parts of the game I could play. I'm not sure if it's my computer or something else, but Felicia's challenge sequence keeps crashing (the text starts scrolling, then it stops and the game freezes). I've fought my way through it four times now and have not yet completed it. :/
It's probably been said before, but this game is hell on colorblind people. I cannot tell the blue balls from the purple ones or the yellow balls from the green ones.
This is an enjoyable game, for the most part. However, the insane lag whenever I use the end-level door, or die, or try to buy something in the shop, is something of a deal-breaker.