Good concept, but there is way too much grinding . After level 5 it reduces to having enough attack/HP to outbeat the current boss, clicking on a completed quest until you can afford another ATK/PARAMS upgrade and grinding the 1st level for keys.
Not too bad. The main bottlenecks are remembering all the triangle hints, the unhinted room at the safety box (click to the right of the chair) and that if you mute the game you will not realize youve unlocked anything. Spoiler: there are 2 doors after the crab lock door.
The key is not overupgrading excep tor for production. Clicking 16 coffee plants in 6 seconds for a second of end game production is too much and the whell will not let you exceed a full cup, so it goes always goes black in the end round. Not to mentions the music and bone upgrades.
Still 5/5
Good intro, interesting combat system. The main inconvenients are 1) having to backtract more than 4 rooms to buy upgrades, add some siderooms, 2) the sniper rifle has no reason to exist: give some special ability (boss damage*10, retrieving hearts out of reach) and 3) when the enemies clumb together the bomb-type ones cannot be hit until the other ones are destroyed.
If you enter in chrome, copy the url in the blank iframe and paste in the url bar, you CAN get the app to work in Firefox/IE11/Chrome. Make it a favorite, and still beats Badge Master.