A little too grindy once upgrades start costing 5000+, but still quite refreshing. Perhaps make it drop special 5x coins at higher levels, or incorporate some sort of coin multiplier effect upon killing skulls.
Finally, a game that lives up to the term "roguelike". Absolutely brilliant, Randomnine! This brought me right back to the old 80's DOS games I could play for hours on end.
This game very badly needed more playtesting time. The pacing is boringly slow, there is too much healing, and the enemies have nothing unique about them.
My sole beef with this game is that I found myself retrying some levels dozens of times after having mentally solved them, simply because they required unusually precise timing / controls for a puzzle game.
For such a short game, this is one of the best point-and-click adventures I have ever played... and yes I'm including the 80's & 90's DOS classics! Brilliant concept from start to finish.
I played this game three years ago and loved it, 5 stars. Then the badge of the week came up, and I'm going to beat it again, because 5 stars aren't enough.
This simple little game is simply brilliant!
I really appreciate your stated design goals, but the difficulty is simply non-existent. Using the most obvious tank designs, I feel like I broke the game, in the sense that I was murdering everything and taking almost no damage. It turned into a game of patience, simply moving in one direction until I met the boss and hit the max level.
Perhaps the difficulty as you wander farther out should grow exponentially. Maybe also watch the number of gun points allocated per level, as that is what I exploited to put lots of big guns on a tiny bubble, making myself very hard to hit yet spraying bullets everywhere.