Nice puzzler, played it today for around one hour and really like it. One question here. The Arcade game "Columns" offers the possibility, to be able, to switch through the sequence of colors in the falling piece in both directions. On the C64, because we have only one Firebutton, there is only one direction to switch through the colors now. But there are different possibilities in the meanwhile, that can change this.
For the real C64 there are adapters like the Gen-Assister for MegaDrive Controllers, that is plugged in both joyports of the C64 at the same time and then the user can have the function of the SPACE BAR on one of his buttons on the gamepad.
And in C64-emulators like for example HOXS, DENISE or CCS64 the user has a function that allows mapping of keyboard-keys to a button on the controller.
If "Pillars" now would have only one simple thing more, it would be fantastic to use in both mentioned ways. The game should switch through the colors in reverse order, when the player presses the SPACE button, than it does, when the player presses the normal Fire-Button.
Then emulator-users could simply map the SPACE button to the second button on their controller (in the menue of the emu) and users of adapters like the mentioned Gen-Assister already have SPACE on their second button on the MegaDrive gamepad, as soon, as this adapter is connected to both joyports of their C64
Then all these users could play the game like the Arcade version of Columns can be played, with two buttons. And an additional keyboard-control of the game would also not be bad, there are not many keys needed, then all players could play with two buttons. Left/Right/Fire1/Fire2, that's all. Maybe that could be included too, but the first suggestion, with "SPACE-BAR, to switch colors in revers order" would be the most important.
What do you think about it?