I have only played Sega Zool and I had a lot of fun with it, especially the movement. But there's a level pretty early on that doesn't provide enough collectibles for you to gather to progress to the next area. So you have to hope enemies drop enough collectibles for you to progress, but the chances of them dropping are pretty low. Timing out on that level repeatedly without ever progressing is pretty easy to do. Kind of ruined it for me.