It's an 18 wheeler. No way it should be blowing up if it drives over an incy little bit of sand or scraps its front fender on another truck.. Get real dude.
Not to bad.
Kill and Score counters count to slowly. Looks nice, but annoying to wait for.
Towers need upgrade and sell options.
Need to look at balance as machine guns and sniper towers near the entrance (or exit) do it every time.
Upgradable towers are sort of expected these days. You should also be able to sell them.
This whole style of games is fundamentally flawed as the arrivial rate of new blocks is so much greater than your potential removal rate. Even 1 block added per move would be to high.
Seems to be a respawn problem - If I kill a respawner, I get whatevers coming onto the screen when it respawns. Makes some levels much harder than they should be. I've also seen airbourne monsters following the ground path.
Controls really frustrate me, as does the turn based shooting. My ships should hold fire until they are in a good position, then unleash a barrage, not have to get to the right point at the right time.
Chat window is intrusive, and appears to contain adult content.
Game seems a bit flaky scoring and end level wise. Often had to go back into a level and watch it play through to actually get a medal awarded and unlock the next level.
Nice idea though.
Usability wise, it would be nice if it kept a list of the last few input/output pairs - save me from having to write them down (esp as the output doesn't stay on the screen for long enough).
Then you've got to fix your encryption methods, as most of them have a very short cyclic period exposure. Feed in the output as input to get a number. The feed that number in as input to get another number. Keep feeding the new numbers in until you get the original output again. With many of them, the period is as short as 1 - second number produces the required output.