For the medium badge, keep in mind that you can reset upgrades and rearrange them as you see fit to make some achievements (like Bourgeoisie and Flying Solo) easier to do.
Sky Captain is by far the hardest of the achievements, but still doable with Poseidon's Blessing, Phoenix Pendant (which essentially gives you 3 extra lives on land) and some RNG luck.
I can't believe this game was made all the way back in 2013 and was still SO AWESOME to play through! A little tip for the final wave - you can leave 1 guy alive to get at max health and recharge your cooldowns before tackling the axe boss. With him, and at full health, don't sweat it with avoiding all his axes. Burn him down first at the final epic boss fight, though.
This game is good only for the 3 badges it offers. I highly suggest NOT going for every item a fox can drop - the enemy foxes scale exponentially, while the bosses... don't scale at all. Seriously, if you can kill 1 (one) fox anywhere on a level, then you can deal with the boss at its end. This game is all about avoiding the foxes and leveling "L" so that cats don't face-plant somewhere on the level. You can easily complete the game if "L" is around ~20 for each cat. Maybe even ~15 will do. Another bug: if you finish the game and start again, cats level up for some reason. Use this to your advantage to boost your cats' stats up quickly, so you can easily gather all the items (if you really want to). This game is too buggy and too unbalanced, and it also eats around a gigabyte of RAM, after I've been running it for a while on Chrome. So I give it 1/5.
Nice to see new and innovative bombs to be shot from the catapult. But games like these still suck. In too few cases can you improvise between bomb types and actually play creatively. You just have to rely on being lucky with when you click the mouse button the second time. That's it.