You do get a indication of when the wand is going to blow up on your ass that bar with the wizards head on it when it hits the far left wand blows up same if it gets all the way right.
Game is alright but not being able to back track when you make a mistake is annoying and needs to be fixed so that you can back up and go a different way. Otherwise you tend to get screwed a lot when the game decides to give you this instead of what you were moving the mouse to. Buying new wands is fine but there is no indication on how much better the next wand is and you have no clue on how much each upgrade changes the damage for that color.