Edit: (7/03/2016) Removed the Joy2Key link entirely. I went to the site and the download links are all fishy, even from the site itself. They may be fine, but I don't trust them and so I'm no longer linking to that.
Its been a long time since I've done anything with the first 2 DT games. The last few days, they've gotten some updates that will go out possibly tomorrow.
Changes to Both Games
The big thing that both games have gotten are dash buttons along with the options that DT3 has for turning off up+jump from activating dashes, as well as the left/right or back/forward controls it has. They also have the issue where the directional buttons will cut the dashes short, along with some of the other dash control issues.
This change was made as well. 'Think & Act Fast' will sadly not be the thing it used to be due to this change. We all have the memories at least.
The input bug where your last action might be repeated after taking damage was fixed. Easiest way to replicate was to get hit and press jump during the flinch animation, you would jump again upon hitting the ground.
Dash mechanics have changed.
Forward dashing is nearly identical to how it was before, though Jerry and Claire can dash a bit further now.
Back dashing is now a short dash back.
Air dashing is nearly unchanged, but will feel a different.
The forward dashing has a bit more control now. If you dash without any directional key pressed, the dash is short, where if the directional key is held, the dash is long. Varying dash lengths lie between this.
DT 1 Specific Changes
Water Barrier now simply makes you invulnerable to projectiles. It does still eat bullets the way it did before. The way the game worked prior is that if either you were very unlucky or a bullet spawned on top of you while Water Barrier was active, you'd still get hit. There's an extra check in the damage code that handles Water Barrier now.
Some of the Beads (equipment items) were tweaked. For example:
Ribbon Bead, instead of reducing status effects by 5 seconds, it makes you completely immune to them.
Specific elemental beads give 20% elemental resist instead of 10%.
Poison Bead now poisons on the third claw attack in the combo string instead of on cripple.
Spells/Abilities had their cost descriptions match what was actually being taken. Some of them I found were incorrect when I went to rebalance them a bit. For example, making the first level spells of each element cost a bit less to cast for both spirit and elemental energy. Nature's Gift still eats both of them up because you're not supposed to be getting hit like a chump. Utility spells like Earth Shift were reduced in cost. The Rock Drill can now deal a bit of damage to lower defense enemies.
DT 2 Specific Changes
Time scores are no longer tracked by seconds, but instead by frame count,