Secret rooms: 1) level 1 on the right 2)level 10 on the left 3) level 18, top right (reach it with the last spring) 4) level 25 on the middle of the left edge of the map 5) level 36 on the middle of the left edge of the map 6) level 40 on the middle of the level, just drop from these two blocks 7) in secret room 1, to the left of the drop (drop down and jump left) 8) in secret room 7, directly under the spawn location 9) in secret room 4, just skid jump to the left (above the spiky ground), double jump and you'll find it 10) Reach the top! - Please keep this comment alive!
it's hard at first but it gets real easy after u like beat your first journey b/c u get all the cards u had b4. it becomes too easy then. but still totally epic. 5/5!
when i met those giant snow beasts. i was almost killed, but that was when i didn't have any ranged units. the round after i got the fire succubus. then i got back on track.