Can confirm! Interesting...do you find them getting overall more difficult, less difficult, or staying consistent?
Are you considering restarts as separate from deaths? Okay, so combining the two, are you saying that you have to either restart (or get killed) by each boss at least once?
Hah! We don't impose any limit, but I suppose if you dynamited your way down a few miles and intentionally never picked anything up you would run into some performance issues. Sorry to keep harping on this, but I just want to make sure I've got this right. You're saying it usually takes you two attempts per boss? One death or restart, and then you beat it the second time?