Devlog // Double It
Designing ECLIPSE: when three powers become one
Most merge games end where they begin. ECLIPSE is DOUBLE IT's answer to the question every long-run player eventually asks: what is all this power for?
DOUBLE IT's powers are mathematical constants — φ reorders the ring into golden harmony, π gathers, e charges the next merge, Σ sweeps every matching pair, ∞ multiplies. Each one is useful alone. But a list of five buttons is a toolbox, not a system. ECLIPSE, the final unlockable mode, turns the toolbox into an economy with one question: use it now, or store it?
Powers are earned, never given
The gauge fills from play, and the fill formula is deliberately opinionated: a bare merge contributes little, and the two inputs that inflate naturally over a long run (merge count, result tier) are dampened. Chain depth and live combo level — the skill inputs — keep their full weight. Sustained, deliberate play charges the core quickly; grinding does not. Each charged power also raises the next threshold, so powers stay an event rather than becoming wallpaper.
The store-or-use dilemma
When the core is charged, the player picks a constant — and then ECLIPSE offers the fork. Use it now for immediate value, or bank it into the constellation: a triangle of three slots in the corner of the screen. Three stored powers fuse. The stored combination decides what is forged — seventeen recipes, each a distinct Ultimate with its own script, name, and character. Triple-e overdrives the scoring clock. Σ-based recipes sweep in waves. The heaviest combinations end in a supernova or a collapse.
The dilemma only works because storing has a real cost: a banked power is a power you did not use when the board needed it. Every slot filled is a promise the player makes to their future self.
Discovery as content
Recipes are not listed anywhere in advance. The first time a combination forges, the game stamps it FORGED and adds it to a codex. This turned out to be the strongest retention hook in the whole mode: players don't grind for score, they experiment for knowledge. The recipe space is small enough to be completable and large enough that completing it takes genuine curiosity.
Teaching without a manual
ECLIPSE's tutorial is free-hand: a real run where captions only name the next goal and every step advances on the genuine gameplay event — never on a tap, never on a timer. The mode itself is gated behind meaningful progression (all five powers unlocked), so by the time a player enters, the vocabulary is already theirs; the lesson only has to introduce the grammar: charge, choose, store, fuse.
What I would tell past me
- An economy needs a sink. The Ultimate is the sink; without it, storing was hoarding.
- Never let the meta-layer interrupt the core loop — the constellation lives at the screen's edge and asks for attention exactly once per charge.
- Name things like they matter. "MATHEMATICAL SINGULARITY" does more onboarding than any tooltip.
DOUBLE IT is playable free in the browser at doubleit.b-smart.xyz — more entries in the devlog.