Terrible start.
Are you sure you want to start a new game? It'll delete your previous save [that doesn't exist].
Pick one of three decks. No we won't tell you what they do. Now that it's time for the tutorial, let's just give you text. Stopped playing there.
The level design does nothing but insult me at every possible opportunity. The noises the blocks make is so completely irritating, I had to mute the game by level three.
Extremely buggy. Game keeps reminding me to look out for sharks and there are not any. Level three wants me to kill three humans, only NO humans spawn.
The game is at once well-polished and very unpolished. The menu transitions are nicely done and pretty cool, but take slightly too long for this sort of thing. The turn-around effect was pretty nice, although it looked a bit odd when changing direction while the piranha faced mostly vertically. Jumping out of the water handles extremely annoyingly, but I did enjoy it when I knocked a man out of a boat and into the water. That boats and people could go through the islands was incredibly annoying.
Good ideas, nice visuals, could use some more work. 3/5
There's several interesting things here, but many little annoyances. At first I hated the push key faster = move faster, but then it started growing on me because I, the player, could make my character work harder by working harder myself. That said, ow my fingers. At first, leveling up seems pointless, until I could finally afford a better pickaxe only to be told to come back at level six. I also didn't like the "you swing valiantly at the rock, but fail; try again" message. It made me feel as though the pickaxe I'd just purchased was very tenuously useful. If as you level up the odds of succeeding increase, I'll forgive you (I only got to level 7 before my hand hurt too much). However, there should be a sound or visual effect for when you swing to no avail, to let the player know that they're doing something.
All in all, decent. Mildly addictive. 3/5