The good: Catchy music. Enemies explode in satisfying shower of gore. Weapons change as they level up with added visual flourish gives a nice feeling of power progress. Plenty of fun and unique weapons (Richard the Werewolf for example). The frustrating: The decorative map elements can block your movement and it is not always obvious that you can't go around them or they get lost in the visual clutter. Since the rooms you fight in are all relatively small you can find yourself trapped. It is a major issue in the very first level, the ones players will probably spend the most time on, but the map layouts in later stages are more open preventing this for the most part. Enemies do not spawn off the screen but teleport in about 1/2 way between your character and the edge of the screen. You will be trying to juke enemies only to have your path suddenly blocked by an enemy spawn. On the flipside you can use this to control where the enemies will spawn on some maps to make the room stupid easy to clear (barring the timer/projectile attacks). The powerup bugs move around and expire after a short amount of time. They can also crawl into parts of the map you can't go. They spawn on enemy death and can spawn offscreen so they can come and go without you knowing they ever dropped. There is also no indicator in-game as to what some of the bugs do and the game does not even tell you until you unlike the Compendium after clearing a run for the first time. The never-explained crown icon on your UI is for weapon evolutions. To evolve one you have to get it to level 10, then defeat an elite enemy. They only have a chance to drop a crown when you have a level 10 weapon. If you also have the specific linked skill for that weapon at level 5, then you can use a crown to do a special evolution with the crown. You have 5 rerolls and 3 banishes for 30 weapons and 15 skills to try and make this work. Good luck. I could go on, but it is still decent fun if you get it for cheap.