How to earn bits (gold) and gems quickly in the My Little Pony android game

You need smove no matter what. I got lucky with credit lottos and my threesome is 500 hp, 450 hp, and 250 hp, to beat all 45 waves you have to be completely focused with at least 20 minutes of time on your hand. To beat all 45 waves I equipped the three characters I used with 100 medium health and 70 medium damage. I used one credit weapon because honestly, without at least one credit item or thing, you're screwed. On to the battle: mow down the first three at the start of the wave then as more and more start coming take them down one at a time alternating quickly between shooters firing at one target. This will kill him a lot faster. If your health starts getting low use a health pack and use damage increases whenever you can. Around wave 40 the enemies get lower health but increased damage. That isn't too hard if you can dispatch them quickly enough. Wave 45, no matter how good you are, unless you have 100% credit weapons and the three best characters in the game you will have at least one of your thugs gunned down. After this target the weakest enemies and hope for the best. I lost 8/11 times at the arena using this method, so don't expect it to work at first.

The main key to hexdefense (in easy or hard mode) is upgrading towers - I don't usually do hard mode but I saw your question and tried Pinball in hard mode to try it out... I got past wave 20 with only 4 towers by upgrading: The strategy I used was to put lazers in a way to maximize damage where creeps go and to use missles (red) to take remaining hits.

• I first put a lazer just above the eastern + to catch creeps on their way up (it is helpful to first note their pattern without any towers).
• Then I put a missle as soon as I could N, N, NW of the exit to take care of 1 or 2 stragglers on wave 2.
• Then I upgraded both of these fully.
• Then I put a missle SE, SE, NE of western + to maximize the lazer's damage.
• After upgrading that, I put a second lazer S, SE, SE of the western + to double the lazer damage on the diagonal between the two lazers and upgraded (both these upgraded lazers were able to take out the fire boss on wave 15).
• Then I put a few more missles in, not impeding creeps current path.

This got me to wave 24 (which is very horrible since I know people have done FARRRR better - leaderboard shows wave 117, prolly on easy mode), but this is just one strategy to work with, though I still don't know how people get to wave 260 on the Intestines level, or even to wave 50.