I liked the fact that you tried to give a twist to the idle game concept by adding health and healing (even if in terms of game mechanics it's the same as clicker hero's max time for boss battles).
This game however has 2 main flaws: one is the laggy interface, at least on my PC (but it's an AMD a8, with 8 gb of ram... maybe there are some incompatibility issues)
And 2, so far( I've just beat lv 20 boss) I haven't seen any serious upgrade. Usually idle games have very expensive upgrades that cost a lot of time to get, but once you get them you have that feeling of "OMG I'm going to kick ass for the next some levels", then that upgrade's "powerfulness" gets gradually less relevant, until you decide it's not worth your money to buy another one of those upgrades and you wait until you have farmed enough moneyfor next tier, and then again you kick ass for some levels, and so on. That's what makes idle games (and gringing in general) fun.
Usually the formula to get an upgrade's "power" (like damage) is like this: (costant^tier)*(quantity owned) while the price to buy another is base price + increment * (costant^quantity owned), and the player must guess what is the most efficient upgrade to purchase next.
Sorry for the poor english, I can see you have some good potential, so I thought it was worth my time to give you some advice.