Hey thanks for noticing the health upgrade, it only hurts you if you are on full health, so there is always an opporunity to heal straight after getting it. I think the prompts after getting an ability were a bit too subtle, I was trying to keep it minimal, but lots of people missed the health one I think (you are reminded after first hit and first time down to 1 health too). Not sure it did the best job of communicating the upgrades while staying minimal (which is what I was going for)