Really nice game, initally very hard when you only shoot a single arrow every few ticks.
but becomes increasingly easier nwhen you shoot like 6 arrows every othe tick that can ignite, freeze and acid puddle all at once :-)
saying:
cool game, love it, I reall enjoy these kinds of "fight wave of monsters and choose a new upgrade every 10 dead enemies or so" kind of games.
onbly wasnt initally obvious what to do since I hadnt read the instructions so I unintentionally grinded a while before activating the obelisks and defending the portal :-)