This is a game with a lot of potential.
I really enjoyed the intro sequence of the ship crashing in from space. This being part of a short game jam (2 weeks) it's impressive to see that level of work put it something that could have been left out in favor of focusing more on the core of the game.
The biggest part of this game, what you'll encounter again and again, for better or worse, is the giant tsunami that washes over the island every now and then. Its shadow starts to blot out the sun, the tide recedes, and your screen begins to shake as it rushes over the island leaving only a select few spaces of which to stand in and watch the water fly by. It's quite a spectacle.
Unfortunately, this set piece is something you need to wait for for at least two of the puzzles and you can find yourself waiting around for it to get to new places which isn't particularly fun. The puzzles themselves, while simple once you've completed them, are not telegraphed particularly well. I feel the game could have benefited from allowing for multiple approaches to solving them. Additionally, it can be quite slow navigating the map and I think the game would benefit from a faster player speed (and perhaps jump... like a big old moon jump).
With the bad out of the way, this game still has a great atmosphere and is pleasant in general to look at and walk through (even including the looming threat of an eventual tsunami). The low-poly retro aesthetic is quite fun, and the somber music is fitting for an alien and seemingly desolate or vacated world. It's quite the sizeable game for what was a 2 week game jam. Great job!